Personally i'd tweak that a little... mainly the hard drive... go for a 7200rpm 1tb Wester digital Caviar black with 64mb cache (around £60 currently) or maybe for the extra space the 2TB WD green 5400rpm variety for around the same price, again with 64mb cache.
as for the GPU... shop around for it about £15 cheaper, £200 for a 560 is tad high for what is basically a updated 460, as can get the 570 for £250 or a 6970 from ati for £260