I’d say the most versatile bike will be Trek Fuel EX/Giant Trance X. I’ve had both and though Giant pedals slightly better Fuel EX handles better and is overall more fun bike. Bear in mind it were ’09 models though, maybe newer DRCV shock on Fuel EX changed smth.
BTW, here:
http://paulscycles.co.uk/offers.php?cat=1
You can find some previous years’ models at a good price. I’d recommend GT Force Carbon as well – should be a very competent all around bike but you can’t find it at a good discount price and Paulscycles don’t have you size. Always wondered how this bike feels 🙂