hi this year my pc is 1 year old it is desperate need of upgrading i am extremly stuck on what to upgrade to. Do i get the new ati x1800xt 512mb for £390 :'( and wait for a intel crossfire mobo to be released > to do a crossfire set up, or do i go with nvidia and sli 2x 6800gt comes to £370 and a intel sli mobo which are availabe now. open to any suggestions thanks ;D

my machine is a pentium 4 530 socket 775 with some crap mobo by dell lol hence why i want to upgrade.