I'm giving myself an early Christmas present. My old Acer is doing some seriously weird stuff lately (had to add in a PCI NIC & a PCI IDE controller for the DVD drive), so I'm building a machine to replace it.
Here it is ... above average performance for less than $800 (at Tiger Direct):
BTW - the 1st HDD will be for Windows 7, and I'll add Ubuntu 10.04 LTS on the 2nd HDD.