In addition to my side 80mm fan I have a 120mm inlet on the front of the case and 120mm outlet fan on the back. My power supply also has two fans, one sucking air from inside and the other blowing it out the back. Fans are cheap, if they're lighted they look cool and the 120s don't make much noise at all. Computers need bling too.
76º is just fine for that 8800GT! I've blown my upgrade money for now, or I'd be searching one of those out. It would have been crippled connected to my old Athlon 64 3700+ though. That's OK, I knew I wasn't building a rocket ship.
It runs SH4 fine!