Personaly I'd opt for a higher wattage PSU. When I bought the PC i'm using now I had doubts about the 350w PSU but I was assured it could cope with anything I wanted it to do. They claimed it had a more efficient output that most. After several problems and several months they replaced it with a 500w PSU.
hmm. well the mother board needs atx 2.0 to support it and that is what the psu has. it has to support the pci express too. anyway im most concerned with compatibility but i dont think there should be any problems.
Vitruvian Man Please keep us posted on your progress. The selfbuild is soemthing that I'm planning on doing later and your specs (with larger psu) seem the sort of specs I'm after. I haven't costed it all yet.