Thanks for the info. I've been looking at an 80 Plus PSU on newegg.
Newegg.com - Antec BP550 Plus 550W Continuous Power ATX12V V2.2 80 PLUS Certified Modular Active PFC Power Supply
It's got a zillion good reviews, and it might even fit into my new lenovo case.
I don't know if I'll need that much power for the graphics board, but later
on I might want to install another disk and maybe some tiny PCI boards.
(I've never seen the shorty type PCI-1x sockets, I hope that's what they are).
The fans in this thing don't make any noise, after it boots. I guess they
run at real low RPMs. It's a great PC for watching NetFlixs!