Thanks for the link!! Where are the "recommendations" posted by NVIDIA? And doesn't it depend on how many other items you have? I saw some recommendations on the GTS250 stating that it needs a 450W PSU, but my rig has been running just fine for 18 months.
According to that post above, it looks like the 460 draws 100W more than the 8800GT (which is about the same as the GTS250). That's a good indication that I might be pushing it if I do this upgrade.
I guess I will just have to wait for the next upgrade to go to Intel i7/DDR3/GDDR5. I am still debating about sticking with a Shuttle 500W (http://global.shuttle.com/product_detail.jsp?PLLI=943&PI=1389)
when it goes down in price or going with a mid-tower. I kind of like the compact PCs, but they do limit upgrade ability and definetly any possibility of cross-fire.