You are pushing it a little with all the goodies you got. But you're not using everything at once now are you? But if you have good wiring in your home/house/apt. and clean power, ie... no sporatic brownouts or blackouts or power surges. Then it should do you well. Question is how long have you been running this configuration? And how long is your up time (Time you leave 'Puter on)? UPS and Surge Supressor are all good to keep PSU happy. Also good cooling and flow of said PSU all help to keep the strain to a minimum. This is my opinion.
BTW I'm running a 300W PSU W/Athlon 1Ghz, G-Force2 GTS, 42GB IBM, CDRW, CD ROM, USB Flat Bed Scanner and USB Epson Color Printer. And I do alot of Image editing, Audio editing, CD burning, and Web Page Editing. But also APC Surge Supressor and APC 650 Backup UPS. Still tickin... *Knock on Silicon*
Since your looking at a P4, make sure the power supply supports them cus the P4 needs 1 or 2 extra power sockets to the motherboard. All the Enermax ones as far as i know have all the ones you need. (I know mine does and mines just the bog standard 350watt one).
My 350watt enermax hasnt let me down with all the gumph ive got in here.
Geforce 3 ti 500
Slot 16x DVD
4 PCI cards and 5 USB devices.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS