Building One Budget Test PC with 4 OS

I've decided to build a budget test PC running 4 operating systems - Linux, Windows Vista SP2, Windows 7 RC and Windows XP Professional SP3. If you buy the right Asus motherboard, you can get Linux from Splashtop (instant-on computing). If you install Windows 7 RC, you can get Windows XP Professional SP3 from Windows XP Mode Beta. The main components are as follows:

1. Asus M2N68-VM HDMI ($105) with support for Asus Express Gate (Splashtop) and hardware virtualization in BIOS
   
2. AMD Athlon 64 X2 Dual Core 5200+ Processor 2.7GHz with support for virtualization ($93)
   

You can get any 1GB memory, hard disk and internal DVD writer. The cost will be much higher if you choose Intel instead of AMD processor.