Well, I've begun all my major upgrading by ordering most of my bits today ... yay! I've already got me an Antec Sonata case with my 'old' stuff in it. I'm hoping to have a quiet gaming PC ... hence, it'll be unlikely I'll be overclocking ... much! lol This is what it's gonna include:
The already mentioned Antec Sonata
DFI LANParty UT NF4 Ultra-D mummyboard
AMD Athlon 64 3200 CPU (already bought retail box for £100 at a computer fair ... brand new, sealed and it even smells nice! LOL

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Sapphire ATi Radeon X800 XL 256MB graphic card
Geil value dual channel 1GB (2x512 modules) PC3200 memory
I'm keeping my current 80GB HDD but it may be on the way to the graveyard so may be replaced with a 160GB SATA drive. I'm also keeping the Sonata's 380 Watt PSU because after a little research, it may just be enough power to keep it going with no or little overclocking but if not, I'll just fork out for a Tagen 480 Watt unit ... my poor credit card!
This system better kick much ass or I may have to hang myself ... well, maybe not but it better!