Yeah I recommended you The Hut, Play.com and Game.co.uk
Once more the advantages and disadvantages (for importing):
Play.com - Free shipping (at least to Germany and other EU states), can only pay in € (therefore not as cheap)
TheHut.com - cheap prices, can pay in £ (saves you money cause it uses a more expensive exchange rate), now with PayPal support (dunno since when) - no need for credit card. £0.99 shipping per item
Amazon.co.uk - looks cheap but you need to pay double VAT, payable in £ ,shipping costs (dunno how much), faster delivery
Game.co.uk - cheap prices, payable in £, shipping costs £3,49 (as far as I can remember correctly) per order