Mountain bikes

I've finally come to the conclusion that I can't surf often enough here for that to keep me fit, so I'm gonna get a mountain bike.
Anyone into mountain bikes here?
I have done a bit of research into it all and think I need a cross country bike, with no rear suspension and possibly front suspension as I will be mainly on roads and paths with the odd off road excursion. My budget is up to £300 - which seems a lot to me but apparently only gets me the bottom of the barrell of bikes
!
My best bet that I've seen so far is a GT Avalanche 3.0 with or w/o disc brakes. Cheapest I've found is £270 with discs or £225 without discs - here
http://www.discountcyclesdirect.co.uk/product_info.php?products_id=5560
Can anyone think of a better bet? or have any advice?
Cheers
.
Anyone into mountain bikes here?
I have done a bit of research into it all and think I need a cross country bike, with no rear suspension and possibly front suspension as I will be mainly on roads and paths with the odd off road excursion. My budget is up to £300 - which seems a lot to me but apparently only gets me the bottom of the barrell of bikes

My best bet that I've seen so far is a GT Avalanche 3.0 with or w/o disc brakes. Cheapest I've found is £270 with discs or £225 without discs - here
http://www.discountcyclesdirect.co.uk/product_info.php?products_id=5560
Can anyone think of a better bet? or have any advice?
Cheers
