Please help: Are these compatible?

[shadowlift]

Hey guys please help me i want to know if these components are compatible or not, and if this is a good build? Please post recommendations to anything you think i should alter, thanks
*OVERCLOCKED* AMD Phenom II X3 Tri Core 720 2.8GHz @ 3.5GHz (Skt AM3) / Gigabyte GA-MA790XT-UD4P Motherboard / Corsair 4GB DDR3 XMS3 PC2-1600C9DHX TwinX (2x2GB) Bundle/Arctic Cooling Freezer 64
http://www.overclockers.co.uk/show [...] =FS-002-OB

XFX HD 4850 £100
http://www.overclockers.co.uk/show [...] =GX-127-XF


WD Caviar Black 500GB £52
http://www.overclockers.co.uk/show [...] =HD-245-WD

SH-S223F £17
http://www.overclockers.co.uk/show [...] =CD-099-SA

Vista Home Premium 64-bit OEM £92
http://www.overclockers.co.uk/show [...] =SW-037-MS

Corsair 550VX, 70 pounds
http://www.overclockers.co.uk/show [...] =CA-014-CS

Antec 300, 51 pounds
http://www.overclockers.co.uk/show [...] =CA-101-AN

Thanks

 

[shadowlift]

Would this be a better hard drive?
http://www.overclockers.co.uk/show [...] -SA&tool=3

 

[shadowlift]

hmm link not working, ill repost
http://www.overclockers.co.uk/showproduct.php?prodid=HD-053-SA&tool=3