Compatibility or better options?

This is a new venture for me. I chose the parts on computerplanet and it says they are all compatible but want to double check.

Tis a gaming build.

Case: Cooler Master Elite 431 Plus Black Mid Tower Performance Case with Side Window with USB 3.0 & XDock HDD Bay £46.12

CPU: Intel Core i5 3570K,1155, Ivy Bridge, Quad Core, 3.4GHz, 5 GT/s DMI, 650MHz GPU, 6MB Smart Cache, 34x Ratio, 77W, Retail £174.18

PSU: 800W Corsair Gaming GS800, 85% Eff', 80 PLUS Bronze, SLI/CrossFire, EPS 12V, Quiet Tri-colour LED Fan, ATX v2.31, PSU £64.80

RAM: 8GB (2x4GB) Corsair DDR3 XMS3, PC3-10600 (1333), Non-ECC Unbuffered, CAS 9-9-9-24, 1.50V £26.13

M/Board: Asus P8Z77-V LX, Intel Z77, S 1155, DDR3, SATA III - 6Gb/s, SATA RAID, PCIe 3.0 (x16), DVI-D/ HDMI/ D-Sub, ATX, USB 3.0 £77.72

S/Card: Creative Labs SB X-Fi Xtreme Audio PCI-Express - New Version £22.51

W/Card: D-Link DWA-556 Wireless N PCI-E Desktop Adapter £49.97

HDD: 500GB Western Digital WD5000LPVT Scorpio Blue SATA 3GB/s 5400RPM 8MB 2.5" £37.50

Ready to order from Scan but would just like confirmation or advice, cheers guys