As you’ve not specified a budget, here’s a list of good VFM parts that I’d be happy to use on my Blue Pig. All prices are from Merlin unless otherwise stated (assuming with a name like lancslad they’ll be fairly local) and include the current 10% discount.
Groupset: SLX (£225). It just works. Whatever you chose you’ll also have to buy 3M of cable outer as the frame uses full length outers.
Brakes: Avid Elixir 3 with 180/160 rotors (£99). If you’re a big lad consider 203/180 rotors.
Handlebars: Ragley frames really suit wide bars. I’ve just swapped a 720 set of Sunlines for a 750 set of Easton Havoc’s (£36) and prefer this width.
Stem: IMO all stems are very simalar in feel no matter what you pay, the more expensive are a bit lighter. Ragley frames are designed around short (50-60mm) stems. £27-30 gets you a Raceface Evolve or Respond.
Grips: Large hands – Lizardskins northshore (£16), medium or small – Superstar supagrippa or size zero (£8-9, http://www.superstarcomponents.com)
Pedals: Superstar Nanotech (£43).
Saddle: My perch of choice is a SDG Bel-Air (£36), however another popular VFM saddle is a Charge Spoon, A google search should be able to get one of these for about £20.