Need advice please

[htraffic]

Hi, im a bit of a noob when it comes to all this new fangled hardware.
Im building a new pc, ive decided on spec but not sure on the power supply to go for.

Im going for:
AMD Phenom 9900 - When its released
2x Ati 3870's
MSI Mobo with 790FX chipset

Ive got an antec 900 case

what psu do I need, ideally want it to be modular and have blue lights lol

 

[htraffic]

right im tempted to go for http://www.overclockers.co.uk/showproduct.php?prodid=CA-024-OC&groupid=701&catid=123&subcat=148 that will that be man enough? I know its recommended to get a 550w for the two graphics cards, so that leaves me with 230w to power everything else, that gonna b ok?