OP here. The place in Palm Springs that rented quads was awesome. The rental units were TRX 90s. For a novice, this is a nice quad. The layout was excellent. All kinds of donuts, figure 8 courses, a steep hill climb, and lots of time to ride.
Up the steep hill, the quad really ran out of juice. I had to downshift from 3rd to 2nd just to keep the quad moving. Other than that, the TRX 90 is a very capable unit. Ran very smooth and didn't give any problems.
I really enjoyed shifting weight and whipping the back end out. Felt very different from a dirt bike, but in a fun way.
My budget is about $1,500 and I want a unit that will be in good/great condition. So I'll keep my eyes open for a good deal on Craigslist. A Raptor 125 would be awesome, but they won't 1,500. Any other ideas?