just try to get more cores, 2.6 ghz will do the job.

if you don't overclock an ordinary fan is enough.

for poer it depends on your gpu, if you are gonna get a powerful one you have to pay for a sufficient one. and they are always expensive!

CPU and Motherboard combo-

Phenom II 920 2.8Ghz Quad core & ASUS M4A79 Deluxe AM2+/AM2 AMD 790FX ATX Motherboard - Retail.

http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.203009

Case & power supply combo -

Coolermaster 690 case & corsair 650TX series PSU Crossfire/SLi ready.

http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.200608

$453 Total cost for both combo's

GPU -

XFX Radeon HD 4850 1GB PCI Express 2.0 x16,

will run most games maxxed out,the most demanding game is probably Crysis/Warhead,But this card should handle high/gamer settings.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150351

RAM-

G.Skill 2x2gb (4gb) ddr2 1066Mhz

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231166

GPU & Ram $178

Grand total (excluding hard drive & delivery charges): $631

You can't really cheap out on the power supply. Be careful in choosing one, depending on what graphics card you are thinking of geting. For instance, a 9800GX2 would require at the bare minimum 700W power supply, and a 8600GT OC would only need 450W.

And yes, power supplies are expensive becuase they are important.

For your heat sink/fan issue, it would be nice to know what kind of gamer you are and where you use your computer (personally, I have a poor heatsink, and I require two external fans to keep the room cool).

You can't really cheap out on the power supply. Be careful in choosing one, depending on what graphics card you are thinking of geting. For instance, a 9800GX2 would require at the bare minimum 700W power supply, and a 8600GT OC would only need 450W.

And yes, power supplies are expensive becuase they are important.

For your heat sink/fan issue, it would be nice to know what kind of gamer you are and where you use your computer (personally, I have a poor heatsink, and I require two external fans to keep the room cool).