Best choice for VMware Build

Hello,
Im considering building a reasearch machine which will use VMware to run the following all at the same time:

Windows: 7, 8 RC, exchange server, small business server, terminal server and maybe mac osx

My base spec's so far are:

24 GB DDR3 1600mhz Vengeance ram
2 TB HDD

Now for the cpu and mobo i was thinking either...
i7 3820 + Asus P9X79 Pro
i7 3770 + ? (no idea for a mobo)

OR

FX 8120 + Asus M5A97

I do want to keep it as cheap as possible any help will be throughly appreciated.