Pay an extra 50/60 quid and get the new Ashton 26" frame - it's really nice (there's a picture of mine built up in the bike pictures thread). The geometry is really good if you're not interested in something really long (Coust, T-Rex, etc) and it's been designed by a good rider with, I expect, feedback from the other team riders (who ride them at Master level in the nationals). A proven design, and only 250 quid.