With that sort of budget, i would start with the Pioneer plasma 5090 for £2100, then add the Pioneer lx-71 for £600 and the Pioneer lx-81 amp for £1600. Thats the easy part, now for the speakers, with so many choices, and whether you want traditional or style and floorstanders with the traditional speakers. All theses would partner well B&W 685, or a mix of 863, 864, Dali Ikon 6 or Tannoy revolution Signature, MA range. For style the B&W MT-30 or Kef 3005se. If you feel your room is big enough i would go for Floorstanders and you can enjoy music as well.