So here are the Rockport Farnums which, were the most affordable close enough boot 4 years ago (before Todd made his first run), and pretty close at that. It was offered in 3 colors; dark tan, dark chocolate, and black. Obviously, no one here was interested in black. Other than that, members seemed to be split between the tan and the brown boots, trying to determine which one was closer to the color of Indy's boots. Here are the stock photos of the boots in the two popular colors.
My dark tan boots when I first got them were true to stock photo coloring, as were the dark chocolate boots owned by several other members here.
After 3 years of regular wear and care (I don't distress my boots), the boots were a big hit here, despite the poor image quality (cell phone camera).
The boots were clearly in need of polish at the time that last photo was taken. I've since polished them, and worn them enough to get that perfect Matt Damon "Adjustment Bureau" shine, and this is what they look like now.
All my boots, with one exception, look the same after a year or two of wear. The exception, my brown Corcoran paratrooper boots, have a horrible painted on finish that prevents the leather from really soaking up the best qualities of the shoe polish. This seemingly irremovable finish (I've tried several things) is a uniform brown all over, and looks terrible. I still wear the boots often, because in every other aspect, they are extremely high quality. My other brown boots, which I unfortunately do not have any pictures of, were all the same color as these Farnums when they were at the end of their days. Brand new, my Dr. Martins were significantly darker than the Farnums, while the Red Wings were significantly lighter.
The reason I say all this, is because people look at Indy's costume and they see various shades of brown and tan. There are few parts of the costume that have a hint of red or green, but the boots are not one of those parts. When people get their brand new Alden 405s, many cringe at the brick red color, and immediately thrown them in the oven, bury them in the backyard, or take sandpaper to them to get rid on the unsightly top layer (some exaggeration added). Others seek out the Adventurebilt Aldens because they are already have a nice dark brown color. There is no reddish tint to cover up. I firmly believe that if I had the interest (and the money) to buy both the original 405s and the Adventurebilt variation, I could wear them regularly, use the same conditioner and polish on each of them, and after 2 years no one would know which pair was which (except for me). Some people even wondered, when KotCS was released, where they got the Aldens in the old color, because they're clearly not red on camera. I see no evidence that the boots Ford wore were any different than the brick red boots many of you wear. Not to say that they didn't special order a different color, but with the right amount of wear/distressing, it wouldn't make a difference anyway.
So I guess what I'm trying to say with all this is don't obsess about the color of your boots. As long as they are some shade that somewhat resembles a brownish/tanish sort of color, and they aren't an awful painted on finish like my Corcorans, no one will know the difference after a year or two. Not to discredit the Adventurebilt Aldens - I'm sure they're every bit the same quality as the brick red 405s (disclaimer: I've never held a pair of Aldens in my hands - ever), but I don't think it will make any difference in the end. And please, don't distress your boots with sandpaper and abrasive proceedures. Wear them as they were meant to be worn, and care for them as if they were your only shoes, and you needed them to last for years. Now matter how cringeworthy you may find the color when they first arrive, they'll be tolerable in a month, great in a year, and they'll look like they came right off the movie set in two years. If you're ever dissatisfied with the progression of the natural distressing, just apply more polish. Don't worry - the shine is extremely temporary!
Shows you I have not bought these boots in awhile. 405's came first, then the 403's...the number sequence thing had me for a moment there.
Even if these boots are well worn, you still have the undertones of the original color, as noted above here. The only way the off color scenario works is if all the polish/dye is worn off totally, or if you do what you did above, and apply the same shade of polish on all of them. Another tidbit to think on...it is possible to rely on trial and error, buy boots, try them for awhile, and if they don't fit or look right, buy another pair, etc. But if you go through 3-4 pair in the process, looking for a reasonable close enough, provided they hold up, better to just by aldens the first time and apply your fav. shade of brown as they are worn...? 
As you know from being in the military, buying 2 pair makes the user alot less likely to wear the boots out, economies of scale. I agree, on this point: divide the price you paid for the boots by the number of times you use them. This will help you determine if they are cost effective per person, useage. At present, Todd makes the best CE on the market today, and for the quality/resemblance to the real McGuffin, the best price out there.