Firstly, thanks very much for all the helpful thoughts & advice from everyone, really appreciated
I have now finally gone and purchased all the bit's and bobs for my new PC, no changes can be made ! Here's what I went for...
Abit iX38 Quad-GT + Intel Q6600 + Xigmatek HDT-S1283 = £264.11
4GB Corsair TwinX XMS2, DDR2 PC2-6400 DHX =£65.38
Sapphire HD 4870 = £179.99
640GB WD6400AAKS = £57.21 (a pity I didn't grab one off Ebuyer when it was about £51!)
Samsung SH-S223F 22x DVD-R = £16.72
Windows Home Premium 64-Bit = £62.62
Coolermaster Cosmos S = £145.64
650W Be Quiet Dark Power PRO = £92.77
TOTAL: £884.44 inc VAT and delivery...
Now I just need to wait for it to all get here and then the fun really begins... putting it all together!! Expect several hundred questions from me later next week
Thanking you all in advance!