No problem at all.
Yep it's perfect and it should work fine but if you're only planning on upgrading with ATI cards you also could chose one of
these. The reason they're special is that they've been approved by ATI meaning that they can run the ATI 5850. And some could also have the correct plugs, sparing you the use of an adapter. Not sure on that one though.
Edit: (Thanks to Almogaver

)
Yep they seem fine! And the PSU even has the correct pins! This should keep you gaming till the armageddon at 2012.
