The main reason I had 2GB is because I was taking a guess at what kind of stuff would be needed to play games in 1-2 years time. Right now I'm sitting on 256MB with a 32MB graphics card. I can't play many games, and when I got the PC a few years ago it was considered to be a pretty nice PC.

Hmm. How necessary is a sound card these days? I thought they were all built in or something. Oh well, £24.30 for a sound card isn't much, I guess. Now, how about the following, after a bit of adjustment...

Antec Sonata Piano Black Quiet Case - 380W TruePower Silent PSU
Asus K8N-E Deluxe nForce3 (Socket 754) Motherboard
AMD Athlon 64 2800 Newcastle 130nm (Socket 754)
Samsung SpinPoint P SP0812C 80GB SATA 8MB Cache
Samsung SpinPoint P SP0812C 80GB SATA 8MB Cache
GeIL 1GB (2x512MB) PC3200 Value Dual Channel Kit CAS2.5 (GE1GB3200BHDC)
Sapphire ATI Radeon 9800 Pro 128MB DDR TV-Out/DVI
Sony DWU-22A 16x DVD±RW Dual Layer ReWriter (Black)
Sony DDU1612 DVD-ROM (Black)
OcUK Value Floppy Drive - Black
Zalman CNPS7700-CU Ultra-Quiet CPU Cooler
Creative Inspire 5.1 P5800 Speakers
Creative Sound Blaster Live! 24-bit 7.1 PCI Sound Card

Totalling £721.69 and then I'll probably get an HP S7500/S9500 monitor and a normal old Microsoft optical mouse (probably from eBay.co.uk for those two), because I'm so used to them and quite like them too.

overclockers.co.uk seem to have better prices than scan.co.uk, and the guy who will be putting this together for me always uses parts from there, so I'll trust him on that part.

Now. I'm assuming a 7.1 sound card would work on 5.1 speakers.

So, are all those makes/models generally reliable?