How Good will my pc be?

[alex73191]

Case: Antec three hundred ATX case
Processor: Intel Core I5 750
Motherboard: EVGA P55 LE(already bought)
Memory: OCZ 4gb DDR3-1600 Gold (already bought)
Power supply: Coolmax 600 watt ATX
Heatsink: Thermaltake Silent 1156 CPU cooler
Graphics: GeForce GTX 260
Hard Drive: Caviar Black 1TB
Operating System: Windows 7 Home Premium OEM

Im mostly gonna use it for Games and Video Editing.
Tell me what you guys think, primarily i was gonna get a Geforce 9800 gt, windows 7 professional OEM, and i5 650 Processor, but after lots of research, i changed those 3. im on a budget and those few upgrades increaed the overall price so now im over my planned budget, so i cant really get anything more expensive.

its the first time im building a computer too

 

[p1n3apqlexpr3ss]

Get a corsair 550vx or similar PSU, it will put out more power and be more efficient then that coolmax. Also go with a 5770, same job, same price-ish, 5770 has dx11 and less power consumptions

 

[alex73191]

the Radeon 5770 HD was actually one of the cards i was considering, and i compared the GTX 260 with it, and googled it and went to youtube and everything, and overall i ended up liking the GTX 260 more, i also considered the GTS 250 first but quickly changed my mind there....ill look into the corsair psu though