£1200? When you return to this atmosphere take a look at the price of some Marzocchi MX Comps or similar. Expect to pay £200 to £300 depending on what 'extra things' you want the fork to do i.e. do you want lockout, rebound control etc. They're not the lightest forks around, but they are stiff, plush and are fantastically well sealed and with 105mm travel would complement the aforementioned GT nicely.