i just got the hardrock sport '05 tady and it is heaven! (well, compared to my $150 mongoose)
I got it on sale because it was a year older than all the others for $300 and its totally worth the price.

Although its kinda heavy and the tires are slow off-road, you get what you pay for. Its an awesome bike nvertheless

Its really easy to do wheelies and stuff. I spent a few hours breaking it in on the trails today its just wha ti need right now.

Once i get some serious income (right now i live off of babysitting money) i'll buy a stumjumper. that might be in a few years but i dont need it right now...

Get the hardrock, its awesome