Is this build decent? (First build ~$800 gaming PC)

Case - COOLER MASTER Centurion 5 II Black Steel / Aluminum / Plastic Computer Case

Hard Drive - Western Digital Caviar Blue WD10EALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

Power Supply - Antec EarthWatts EA650 650W Continuous Power ATX12V Ver.2.2 / EPS12V version 2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC "compatible with Core i7/Core i5" Power Supply

Motherboard - MSI H55M-E33 LGA 1156 Intel H55 HDMI Micro ATX Intel Motherboard

RAM - CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model TW3X4G1333C9A G

Motherboard - Intel Core i5-750 Lynnfield 2.66GHz 8MB L3 Cache LGA 1156 95W Quad-Core Processor BX80605I5750

Video Card - XFX HD-577X-ZNFC Radeon HD 5770 1GB 128-bit DDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card

And cheap SATA model DVD burner.

Any sort of input is welcome. I have never built a computer before, and my current one is a few years old, so I figured I'd give it a go.

The PC will be used almost entirely for gaming. My goal is to be able to play SCII on ultra, and any future games around high. My budget is >$1000. Just let me know if I'm wasting money somewhere or if some parts don't work well together. Thanks!