I am on my 4th offroad vehicle, so I have learned a few things over the years:
1. Until #4, I have overbuilt each one- they have ended up as heavy, expensive, lumbering gas hogs. I have had to carry fuel to make up for the poor gas mileage ... adding more weight by means of extra sub tanks and cans. I promised my wife I would not do that this time. JKUR with 3" TF lift, aluminum skids, 35's ... and I stopped. I am close to factory curb weight. I see the AEV and think 2 things- fabulous engineering and heavy gas hog.
2. Factory is usually best. The systems that I have had the most trouble with are the ones altered from the factory. I now firmly believe in the "if it aint' broke I better have a good reason to alter it" train of thought.
3. Keep it long term or consider resale value. I will wear out a Toyota so I dont really care what it is worth, short or long term. I plan to get rid of a Jeep at 100k miles, so resale is important. Is there really a robust enough market for a 100k Jeep or would I take a bath trying to sell it in a few years? Likely, the latter.
4. Invest in appreciating assets, keep the costs of toys that depreciate as reasonable as possible. I know that does not fit with Scott's "ultimate" definition, but let's face it, most of us also want to make the mortgage payment.
5. The more I pay for a toy, the less inclined I am to use it for its intended purpose. A new expensive mountain bike gets babied, my 2012 JKUR never saw a "tough" trail for a year or so. If I had a 100k AEV, it might never make it beyond the mall.