Yup, that' the old Klein Mantra Comp. Picked it up used for $500 and rebuilt it from scratch with a mix of new/original parts. Great bike for climbing.
I combat depreciation by building or buying used/"old" bikes. :)) I learned the following:
buying the latest/greatest bikes only leads me to being broke.
buying a new "budget" bike will lead to constant upgrades, and therefore becoming broke later.
cheap stuff breaks when you're pushing the bike to the limit
latest & greatest bike parts add up to a lot of money, and so I end up eating ramen
I can't leave anything alone - gotta mod something or other
So, I end up getting used frames (usually top of the line frames) that are a couple years old for a song and then build the bikes up with the parts I want, and I get my jollies from putting them together, tinkering with them, and trying destroying them on the mountain trails. It's not very different from our AR's (even though I bought a complete 308AR).
Shepp, looks like you're on a good path so far. Get an older model - most bikes don't go through radical changes between model years. It's mostly the hardware on the bike that determines what kind of abuse it'll put up with. A hardtail will cover light to moderate trail riding. All you need from the frame is a good fit. If you have the extra budget, spring for something with better parts (SRAM X.7 or better, Shimano LX or SLX and up), perhaps an air fork. The difference is the bike will last much longer with the better quality group sets and components instead of having to change parts out incrementally over the life of the bike.