Thanks for your thoughts guys.
Snapper - I did have some concerns about the 650W PSU, but the retailer has assured me it will be adequate. A 750W PSu may give me a little more room to move.
Pudfark - RAM is not motherboard overclocked, the Ripjaw RAM model comes already overclocked
http://www.gskill.com
LT.INSTG8R - I'll consider a 7200 rpm HDD. Thought I'd but the OS & perhaps often used software on the SDD.