need help on first build, gaming (AMD), Nvidia, Windows, under $2000

[Iken]

I read the stickys, but i needed more help...

I want to make a computer geared for gaming. I don't know how to overclock so i need stuff thats factory OC'd. I want to use an AMD (I've heard they're the best for gaming), I also want to use an Nvidia graphics card. I need a motherboard that is fast and compatible. As for a case, whatever has the best cooling. I also don't know how large of a power supply I'll be needing.
My budget is a $2000 (give or take).

[jayb1234]

SLI or non-SLI?

Single or dual core processor? How many hard drives and how big?

There aren't a lot of "factory overclocked" components, but with your budget there shouldn't be any need to overclock for game performance.

Does the budget include monitor, keyboard, mouse?

If so, size and type of monitor, wired or nonwired keyboard and mouse?

Power supply size and brand/model depends on what the other parts are.

[786ARS]

all i can get from that is that i would recommend a 7900 GT for that sort of money. not to familiar with cases, but have had good experiances with thermaltake cases/fans before.