Need help choosing cheap but realiable PSU

I need to choose a cheap but reliable PSU for my PC, my old one crashed on me and I dont know much about PSU. I am trying to keep the price under 30 pounds.
Here are my specs:
Mobo: "Intel Extreme D975XBX2KR BAD AXE 2 975X (Socket 775) PCI-Express DDR2 Motherboard - Retail
Core 2 DUO Support, 1333MHz FSB, 8x SATA, 8x USB2.0, FireWire, 7.1 HD Audio, Crossfire Support, Silent, Gigabit LAN."
RamCZ 2GB (2 x 1GB) PC2-8500 1066MHz Reaper HPC Edition Dual Channel DDR2 (OCZ2RPR10662GK)
Processor:Intel Core 2 Duo E6600 "LGA775 Conroe" 2.40GHz (1066FSB)
Gfx:XFX GeForce 8800GTS 560M 320MB XT GDDR3, PCI-Express,2xDVI/HDTV/HDCP,560/1700Mhz
Two harddrives: Western Digital WD1200JS Caviar SE 120GB 7200RPM SATAII/ 3008MB Cache - OEM
Dvd rom: HP DVD940i 18x SuperMulti DVD±RW/RAM Lightscribe Black

Need help!!!

I calc'd your max +12v~22A at best so look for a unit that can handle +12v@27A, such as the Akasa 460w that would be a good minimum wattage unit and it is made by Enhance (label pic link), has a 460w rating, sooo... less 25w for the -12&+5vsb, and less a 100w typical +3.3/+5 loadout which leaves a 335w/28A potential for the +12v rectifiers.

It is slightly beyond your budget requirements but you are better safe than sorry.

edit - fixed broken pic link

here is a real load test review @ EOC it ran 485W with +12v@29.4A combined and didn't break a sweat. Prob because the fan was really loud

I agree with the Wyrm on doing some research and working out what your requirements will be. I will say that FSP (also known as Fortron Source) and Sparkle make some good quality, low cost PSUs. Here is a sample of a good 450W FSP.