look just over half way down the page and ull see that the X850 owns vidia on all benchmarks bar doom 3
https://www.digit-life.com/articles2/radeon/r480.html
20% advantage on the FarCry engine.
I mean its up to you but you'll save a lot of money on a PCI-E X850XT i got mine for just over 150 and got a free game :attn:
I took a long time researching and tryin to get the best system i poss could for the cash cos it aint often i have 500£ for a PC, and looked around a lot then choose the ATI cos i didnt want to spend and extra £50 on something with 20% less performance.
If you get any card though make sure its a good brand who make it e.g. Powercolour or Sapphire or something cos it can make huge differences in performace and also compatablity.
Im biased towards nvidia cos they've givin me nothing but probs + i like supporting the underdog:bandit:
Have fun with whatever card u get