Last upgrade mobo or psu

[MeatLoaf]

Well in the last 2 weeks ive had : X-fi, memory, 4200+ X2, Freecom 250Gb ext HDD, 2nd 7800GT for SLI, Benq DVDRW, and an Acer 19 inc ws LCD.

Got £120 left in the kitty. What should i get - An Asus SLI Premium ( already have the standard A8N-SLI or shall i get an Enermax 600w PSU

 

[MeatLoaf]

Enermax 485w. Its not giving me any probs but im having to share a molex with the DVDRW drive to power the 2nd 7800GT so im thinking i should get a SLI certified model with 2 pci-e power connectors