ok let me see.... so the spec I bought was £370, then the card was £109 and the PSU was £47.99.... £527? then I still had to put windows and office on the machine... but still thats really not bad, you could buy a machine from Dell with a similar spec but it wouldn't come with a brilliant card out of the box and you would spend maybe a grand for an i5?
check out my performance vid, I know its filmed poorly but you can see that both games are running pretty much stutter free on the highest settings.. to my eyes I didn't see any frame loss but the camera I used seems to have been unable to translate it perfectly
[youtube]http://www.youtube.com/watch?v=nS9EXIbxy3g[/youtube]
I play with the settings of crysis at around the 10.23 mark