What PSU should i Buy?

[Bouncy]

I require a new PSU for my PC but to be honest don't know enough about them? if i list my PC Spec can someone maybe give me some advice on which one to go for, i'd rather put money into a really good one instead of a cheap and nasty one.

Lian Li V-2100 Case
Asus A8N32-SLI Deluxe
Athlone X2 4800 Processor
2GB Crucial Memory
2x Ge-Force 6800 GS Extreme 256MB in SLI Mode
2x 200GB Sata Hard Drives
Sound Blaster 2 Audigy Platinum
Netgear PCI Wireless Card
1x DVD/CD-RW
1x DVD-RW DL
Floppy

Many Thanks.

 

[Bouncy]

Can you tell me why they'd be your choice and do you know what the difference between the ATX versions are 2.0, 2.1 & 2.2 i've no idea ?

Many Thanks