Thermaltake TR2 RX 750W Bronze W0382RU ATX 12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply $89.99
Intel Core i5-2500K Sandy Bridge 3.3GHz $219.99
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) $43.99
Corsair Force Series 3 CSSD-F120GB3A-BK 2.5" 120GB SATA III (SSD)$159.99
Seagate Barracuda ST31000524AS 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive $129.99 -$5.00 Instant $124.99
Microsoft SIDEWINDER X4 Keyboard -$59.99 -$12.00 Instant $47.99
ASUS VH242H Black 23.6" 5ms HDMI $219.99 -$40.00 Instant $179.99
LG DVD Burner Black SATA Model GH24LS70 LightScribe Support $19.99
Microsoft Windows 7 Home Premium SP1 64-bit $99.99
XIGMATEK LOKI SD963 92mm HYPRO Bearing CPU Cooler $28.99
750 Watts PSU will allow you to accommodate another GPU in case you decide to add another.
There hardly much difference between P67 & Z68 except support of Intel SRT. Anyway boards with either chipset cost same somewhat.
Considering these, here's a build similar to your but accommodate a better GPU, and 24" Monitor