I think Upgrade are doing a deal on X-Fusion forks and the FF29 frame for £700 all-in. A mate’s done just that.
I’ve got some X-Fusion Forks and have been v impressed.
I’d go for the Superstar / Stans Crest wheelset for £200 then buy an SLX groupset from wherever’s cheapest (Merlin are usually up there).
There are some good deal on bars at Chain Reaction – Nukeproof 800 flat bars are £25 at the mo and Blackspire 808s not much more and both of those would be well suited.
Get a Charge Spoon saddle, some M540 pedals from Wiggle, Twelfty seatpost and Superlight stem from On-One and you’re just about sorted.
Lots of cheap, quality tyres about if you look. On-One’s not a bad place to start.