So here's the deal - I'm going to upgrade most of my system (CPU, mobo, RAM, graphics, maybe SSD) pretty soon but I'm still undecided whether to get a Radeon 5850 or get another 4850 and go Crossfire... Buying a 4850 would cost £70, whereas a 5850 costs £220, minus the proceeds from my 4850 which gives a net figure of £150. Apparently the performances are pretty similar for these two setups, although obviously being a single card the 5850 won't have many driver issues and uses less power. I'm hoping that the 5850 will come down in price once the GTX 470/480 hit the market. I'm interested to hear the thoughts of anyone who has either of these setups, and if anyone owns a DX11 card - are there any notable differences? Also if I get a board with 2 PCI Express x16 slots running at x16 and x4, will there be any significant performance loss?