I agree, I've got two Ti bikes bought used, both brands were trying to break into the higher end markets (a DBR mountain bike, and a Mongoose Pro Road bike) and farmed out their frame manufacture to a quality custom builder (Ti Sports in Washington). I got the Ti Roadbike with full Dura Ace 9 speed for well below $1,000, and the mtn bike for $400 with old Deore XT so I know good deals are out there. Both bikes have great geometry and are fabulous rides.

I consider titanium and steel the only real "forever bikes" but like RFC mentioned titanium doesn't require any special care that steel might, just cleaning and lubing components on a regular basis.