New PC System COnfiguration help.

DOOOMKULTUS

Junior Member
Sep 3, 2008
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Hello guys
I am planning to build a PC system by my self for the first time,with the following specs.

Core 2 Duo E8400
Asus P5N-E SLI
Corsair XMS2-DHX 4GB (2x2GB) DDR2 800MHz Dual Channel Kit
Western Digital Caviar SE16 640GB + WD Caviar 500GB
XFX Ge Force 9800 GTX+
APC Back-UPS RS 800VA 230V (540W output)
In addition i already have ,1 HP usb printer,17 inch CRT monitor also.

I have finalised pretty much everything but now this is where i am getting stuck,i can't figure out which PSU and cabinet to get.More specifically PSU.
I had decided to get cooler master CM690 with cooler master eXtreme Power 500W.
But i keep reading that this PSU is not that good,is loud,etc

Now, I want to know is my configuration compatible first of all,is the eXtreme Power 500W overkill/under kill for my system,and is the cabling in this PSU compatible with reverse ATX of CM690 (PSU being at the bottom of cabinet) meaning is it long enough.
I calculated my power reqs herehttp://extreme.outervision.com/psucalculator.jsp
I am really getting more confused more i read about this.
If this PSU isn't good enough then what do you suggest for CM690.
An Antec EA 650 any good or CORSAIR CMPSU-620HX 620W PSU, some Cooler master or something else.Does it have long enough cables for CM690.
And also since the UPS has 540W output capacity,will having a 540W+ PSU have any issues over there.
Your comments and help would be really appreciated.