Its like choosing between a falcon or a commodore.
Get a 29er.
See if you can rent or borrow a duel suspension for the day first before buying one. maybe you like it, maybe you don't. Can be very smooth for cross country, but your center of balance shifts around a fair bit. You want the balance nice for good landings. Duelies can be heavier than a hard tail (but you're so strong, that wont matter).
Carbon is great, particularly if you have lots of money to throw around, but keep some money up your sleeve to fix/buy a new frame periodically if you stack regularly (If you don't stack regularly, then you aren't trying hard enough).
The little things make for a good ride. Disk breaks are good, lockable suspension and partial lock out is good, as is a seat post that can raise and lower .
I would go mid range on the running gear, as you want something that gives good performance, but also something strong enough to last. Kind of corny, but there are three important aspects in selecting bike parts, strong, light, and cheap - choose any two of those
All this can be yours for your price range |