all depends on how much you want to spend. If you want a super sick rig with like 8' of travel, very plush, very smooth, ur lookin at about $5000 or more.
If ur lookin for a freeride bike, similar to DH, but a little lighter and less travel, you want about 5'-6' of travel. These frames are made to take abuse from jumping off of shit, bombing DH type of terrain, but still light enough to pedal around. This is what I ride.
Freeride bikes are between $1500 for a base model, up to $4000 plus.
The top brands (top $$$) are Turner, Ellsworth, Tomac, and Azonic.
If you want a little cheaper, but still good stuff, look at Rockey Mountain, Santa Cruz, Marin, Giant, Specialized, damn, there are a lot.
Also, get XT or XTR parts. They are significantly better.
hope this helps
-'Kevin, how ya been?'
'Oh, you know, up and down'-(Kevin, the elevator guy at the hotel I work at.)