Advice for Uber Noob - Fuji, Diamondback or Rockrider?

Guderian Posts: 2
edited November 2011 in MTB buying advice

New to all this - want to give it a bash, but don't want to spend too much until I know it's not just a whim!
Yes, I know you get what you pay for, but I have seen these I like the look of:

Fuji Nevada 4.0 ... gn=froogle

Diamondback Overdrive ... 64302.html

BTWin Rockhopper 5.2 ... 56187.html

Interested to know your opinions on these - I suppose if it came to it I could slightly upgrade to the Fuji 3.0, or DB Outlook, the next models up.