I have the Thermaltake Tsunami SWA case and run it with the Antec Neopower. The Neopower is very quiet, rock solid and has a PCI Express connector. It also comes with an adapter for AGP mobos.
I am happy with the Tsunami case. The case cools well, and the side 92mm fan helps greatly. The original Thermaltake case fans were too loud for me but blew a lot of air. The side 92mm fan was especially noisy. I went on a silent kick and started switching out the original fans with quieter ThermalTake and Coolermaster variants. I finally replaced everything with 14db SilenX fans and replaced the stock 6800GT fan with an AV5 silencer. Everything whispers now, and I am very happy.
FYI, my case temp went from 26 to 29 when I installed the SilenX fans. With the AV5 my case temp dropped back down to 26.