Performance Bike sells the GT line, they are on sale at this time...
http://www.performancebike.com/bikes/Product_10052_10551_1098196_-1_20000__400308
Oasis Bike Works in Old Town Fairfax sells the Kona line.
http://www.oasisbikeworks.com/
You do get what you pay for, a decent suspension fork list for >$400 and a decent rear shock can list >$400, right there is >$800...
Avoid all dept. store bikes, you will be disappointed, and weighed down.
Hard core bikers have full suspension bikes beginning @$2K.