Originally Posted by
KeeganB
1. Brand new 2012 Giant Talon 29er one. Hardtail, new, size Large-- $650
Nice bike, new, possibly too big for you if you are 5"11"? have you tried it for size?
Originally Posted by
KeeganB
2. Used 2008 Specialized Stumpjumper FSR. FS, 26" wheels, size Medium-- $600
Very old bike, no warranty, would need to budget for fork, rear shock and bearing replacement at minimum, in addition to purchase price, probably a lot more.
Originally Posted by
KeeganB
3. Used Radon QLT 7.0. German bike, FS, 26" wheels, size 18"-- $650
No info on age, same with Specalized for service
Originally Posted by
KeeganB
4. Used Scott Spark Comp 29er. FS, size medium -- $650
No info on age, same with Specalized for service
From riding a Camber to any of these will feel like a downgrade, you need to look at fit as a key factor, but all the 2nd hand bikes you have linked to are full suspension, and could have major expense in bearing and shock service needed in addition to the purchase price, and you need to budget for that.
From the list The Giant Talon would be best, as you will have no service / warranty issue, if it fits you, although you haven't given much info about the age of the last 2, or the general spec of any of them, as this could change things,