My first goal will be to pass my VCP5-DV in February 2013 (It is already booked!) and probably work on some other certifications like Hyper-V, SCCM, W2012...
Here is the configuration I choose
My HomeLab will run on 3 Whiteboxes:
-2 HYPERVISOR running VMware ESXi VSphere 5.1
-1 STORAGE SERVER running FreeNas 8.3
HYPERVISORS (2 New Whiteboxes)
For this box I took my old HTPC and replaced some components.
More detail on HomeLab page....