Need asap advice on fsp epsilon 600 watts...

My advice is to avoid the FSP Epsilon series, it is not FSP's most stable line and you can get much better then it. Is there any reason you want this in particular? You would be better off getting a PC Power and Cooling Silencer 610W or a Corsair VX550 or TX650 if you are looking for a power supply in the 600W range.

Get one of the PSU's made by SeaSonic, the PC Power PSU mentioned above is a great PSU. Well worth the money.

thanks guys...

If you are in the US, the Corsair VX550 and the TX650 are both $90 after rebate, so the TX650 looks like a good buy right now if you can splash out the initial $110 and wait for the $20 rebate to come in the mail later.