Just done the last upgrade to my SB75G2. It now contains:
Intel Pentium 4 3.2GHz
1GB RAM
80GB SATA Hard Disk (OK this is upgradable if I run out of room!)
Plextor PX-708A (Might get Dual Layer Soon)
XFX 256MB Geforce 6800GT (Came this morning, it just about fits!)
Had a 9800 Pro in there previously. What can I say, any game all settings turned up, wow. I know the 7800s are out. I tend to now keep a generation behind in graphics, I mean its silly to keep splashing out £350 each time a new one comes out. Besides all games should play on this system for a while.
Next upgrade, next year - probably. To Dual Cores