I got a few ideas for you WNCbiker, I'm 2" shorter and ten pounds lighter and I ride a 2002 Giant AC1, its a 19" frame, 6" rear travel, hayes hydro, raceface cranks, and a bunch more.
Giant makes a bunch of big bikes, The AC1 and AC2 and very good DH/Freeride bikes. The highest I've dropped on mine is a fifteen foot drop(which was very freaky) and been doing 5' to 10' foot jumps constantly. A bunch of us set up a jump and were getting 8' air high and almost 20' distance down a hill. I've put my AC1 threw alot and it hasn't talked back yet.
Ellsworth makes a Joker and a Joker SL (anodized vs. un-anodized) which is 7" rear travel(new this year). My Best-friend has one of these, I've seen him in action on the thing its crazy. This guy is "not right in the head" he has done many amazing things on it and only broken his main pivot bolt on it(no frame damage).
check either company out they make good bikes and will take the thrashing that us big guys can dish out!!