Recomended Build: Under 1000$
AMD Phenom II x4 965 @ 3.4ghz
ASUS M4A79XTD EVO
G-Skill 1333mhz PC-10666 DDR3 Ram (4 x 2gb)
Sapphire ATI Radeon 5770 GDDR5 1gb
Corsair PSU 750w
WD Caviar Black 640gb 7200rpm
PD: I would NOT recommend the ASUS M4A79T Deluxe if you don't have 2 video cards in Crossfire, it's the same chipset as the ASUS M4A79XTD EVO... the only difference is that the chipset on the XTD EVO is a 790X, and the Deluxe is a 790FX (They even have the same South Bridge; AMD SB750)
The M4A79XTD EVO supports 2 PCI Express 2.0 (Single @ 16x, Dual @ 8x) 790X Chipset limitation
The M4A79T Deluxe supports 4 PCI Express 2.0 (Single @ 16x, Dual @ 16x, Triple @ 16x, 16x, 8x and Quad @ 8x all cards)
It's the only limitation; BUT if you're thinking of Single Card configuration, then you are just wasting money on the M4A79T Deluxe, you can save up to 75$
Another thing, don't use 1600mhz DDR3 Ram with AMD AM3 Processor, use 1333mhz, it's way more stable.
ATI Radeon 5xxx series are a GOOD recommendation cause of the full dx11 support, and the 5770 (the cheapest one) is about 150$ which you can buy with the 75$ savings from the MOBO and the price of the 4770 you were planning to buy
Overall this would be a really good gaming build, in fact that's my next build, even though im not a hardcore gamer.... im just waiting to sell my current PC to complete the money for the new one..
Hope my info helps!