Don't buy anything before the 8800GT launch on Monday. We should have plenty of reviews and the cards should be available at that same time. Rumors are the 8800GT beats the current 8800GTS but is priced around $250!
I've just read the 8800 GT review at Tweaktown. The 8800 GT is better than the HD2900XT and HD2900Pro. Unfortunately it's just as noisy and hot as they are, much worse than the 8800 GTS . If the 8800 GTS price drops to $40 less than the GT, I might still prefer the GTS because it's cooler and quieter and almost as fast.
Yeah. When I did my research for the 8800 GTX it turned out that BFG and eVGA had quieter and more effective coolers than others. That's how I ended up with a BFG. Hopefully they will have 8800 GT cards with 60 dB output, not 73. If that requires a big fan and two slots, like the GTX, it's still a good idea IMO. Maybe even MSI will have a dual-slot version. Too early to tell...
Edit: I'm trying to find out if the Thermalright HR-03 works with the 8800 GT. If it does, this will compete with the 8800 GTX very seriously.