That power supply should be fine unless you get crazy with the add ons and go with a monster vid card like the geforce Ultra. In that case you might run out of juice, but I doubt it.
Make sure you get a good cpu cooling fan. The stock one bites butt. The Global Win fop32-1 is cheap, easy to find and works very well. Other good ones are the new Alpha 66, Alpha pal6035, and even the Chrome ORB should suffice. It looks the coolest. I am running the Hedgehog all copper with a ys-tech 26cfm fan and it also works great, but the copper HS is pricey.
What mobo? I am leaning towards the MSI KT7 PRO2a as my favorite. I just used one in my wifes system and it is an impressive board. It was very easy to set up and overclock.