I'd consider an 8800GTS rather than the GT. Slightly faster, but they use a two-slot cooling system that works better, and with less noise.
If you aren't planning on doing SLI, then there's no reason to stick by the nVidia chipsets. Intel's P35 is just fine.
Couple of good basic motherboards with that.
http://www.newegg.com/Product/Product.a ... 6813128337
http://www.newegg.com/Product/Product.a ... 6813131278
You can get more expensive, more feature filled ones, but don't spend on what you won't use.
Keep in mind too that if you aren't using a ton of high-drain hardware, you don't need a 700W PSU. You want to buy a good unit, but a high end one designed around an SLI setup isn't necessary.
IMO, if you aren't big into doing your own hardware stuff, don't mess with overclocking. Stock speeds with a stock cooler will do you just fine, with less stress on the components.