!Help Please. What Power Supply "Watts" to choose?

[DrLynx]

I have decided on the following configuration for my new computer:

Athlon XP 2500+ @1833Mhz "Barton" core - (Retail) Box Pack (with heatsink and fan) - 333FSB

A7N8X-Deluxe Motherboard (with Soundstorm) PCB Version 2.0 or later {I heard this one takes up a lot of PSU Watts}

Gigabyte R96P128D (Radeon 9600 Pro) AGP card {This one too seems to take up a lot of PSU Watts}

333 Mhz 184-pin "CAS Latency 2" Unbuffered non-ECC (non-registered) Double-sided x8 or x16 256 MB DDR x 2 = 512 MB DDR [Run in Dual-Channel mode at most aggressive timings]

Seagate 80 GB/7200 rpm HDD Ultra ATA/100 Barracuda HDD

Samsung 52x Combo Drive (16x DVD, 52x CD Rom, 52x Write, 24x Rewrite)

Samsung 52x CD-ROM Drive

Samsung SyncMaster 753S 17" Monitor

Samtron 40Bn 14" Monitor (Dual-Monitor Setup)

Creative Inspire 5200 (5.1 - 6 channel analog speaker)

PixelView PlayTV Pro Ultra w/FM (PCI TV Tuner card)

CanoScan LiDE 20 {This one is USB Hub Powered. So, takes power from PSU}

Lexmark 3200 Inkjet Printer {This one has 2 cables. One is directly connected to the UPS while the other goes to the back of the case. So, I doubt if it will take any power from PSU}

D-Link DFM 560ES (External 56k Modem) - {Connected directly to the UPS and also to the back of the case}

SmartMedia card Reader/Writer {Again, USB Hub Powered}

1.44 MB Floppy Disk Drive

Frontech Fantasy Pad {Again USB Hub Powered}

Typhoon Ramses Joystick {Gameport}

Logitech 3-button Optical Scroll Mouse {Again, USB Hub Powered}

ATX Cabinet w/ 2 80mm fans (1 in lower front - Intake fan + 1 in upper back - Exhaust fan) w/ Front USB connectors

Now, I am trying to choose my Power Supply Unit.

How many Watts would I need? Power Supply Calculators @ http://www.jscustompcs.com/power_supply/&e=7413 and http://www.utcache.com/power.asp&e=7413 tell me that I need more than 350W PSU or 400W PSU.

But, my friends say that this configuration would NOT need more than a 300W PSU.

Please help me. What PSU specification to go for? 300W or 350W or 400W?

Thanks all in advance

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[NeoPTLD]

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