I've been deciding on a new PSU for my HTPC, Moneual 320 case, Athlon XP X2 4800+ etc.

Based mainly on noise considerations I decided on the Enermax ECO80+ ESS500AWT which has good reviews and is on the recommended list. However this particular model seems very difficult to get in the UK without paying £100+ (most online retailers have it for £60-£70 but are all out of stock). Can anyone suggest why this might be, or where I could get one.

On a side issue, do the 350W and 400W variants have the same noise characteristics as the 500W - I would expect they do at low power as it's likely they use the same fan but the fan speed may ramp up earlier for the lower rated ones.

Any help/advice is welcome. Thanks.

Can you get by with a pico PSU?

http://www.kustompcs.co.uk/acatalog/info_1667.html

I've not got much experience with PSU's but I think 150W is a little on the small side for my HTPC setup. Here's more detail;

Case - Moneual 320
M/B - ASUS A8AE-LE
CPU - Athlon XP X2 4800+
GPU - ATI Radeon 4550
RAM - 2x 1GB
SSD - 40GB Intel 320 Series
HDD - 1TB WD Caviar Green
DVD/Blue-ray drive to come

The Moneual 320 has an LCD display, card reader, IR receiver and usb port driven off the M/B usb headers. PSU calculators I've used suggest 260-270W.