Which bike for a relative newbie?

Trancey Posts: 3
edited November 2009 in MTB buying advice
I currently have a 1996 Gary Fisher Marlin which I bought new but it has had little use. I need to lose some weight and have decided to get out on the bike a but more and I'm going to invest in a new bike as my employer uses the Cyclescheme, I also want to start riding regularly and get into it a bit more. I'm looking at spending about £600-£800 on a bike, what is the best spec/buy? I won't be on the road much, I live near a lot of cycle paths etc. and will also be riding on beaten paths. I had been looking at the Specialised Rockhopper SL 2010, how does it compare?