Small, Low Power, Budget, Virtual lab build

Hey Guys, I didn't want to hijack anyone else build thread with a slightly different topic, so I figured I would start a new thread.
I am going to be starting on MCSA and VMware certs in the very near future and need to have a separate machine to lab with. I am looking for something that is going to run the OS's and allow me to make configuration changes, but no heavy processing. I also plan to leave some room to grow on the machine. Additionally, I live in Hawaii and the electricity rates are atrocious, so being energy efficient is a big requirement.
With that in mind, what you do you guys think of this build:
CPU: AMD Athlon 5350 APU, 2.05GHZ
MB: ASRock AM1B-ITX
RAM: 8GB Crucial Ballistix 1600 single stick (So I can add additional 8GB later)
HDD: WD 320GB 7200rpm
PSU: Corsair CX430M 430Watts
Case: Cooler Master Elite 110 Cube
This build would be very energy efficient and leave room for a SSD, larger HDD and more RAM later. At this point, I just need it to run the host OS and maybe 1-2 VM's at a time.
Thoughts?
-B
I am going to be starting on MCSA and VMware certs in the very near future and need to have a separate machine to lab with. I am looking for something that is going to run the OS's and allow me to make configuration changes, but no heavy processing. I also plan to leave some room to grow on the machine. Additionally, I live in Hawaii and the electricity rates are atrocious, so being energy efficient is a big requirement.
With that in mind, what you do you guys think of this build:
CPU: AMD Athlon 5350 APU, 2.05GHZ
MB: ASRock AM1B-ITX
RAM: 8GB Crucial Ballistix 1600 single stick (So I can add additional 8GB later)
HDD: WD 320GB 7200rpm
PSU: Corsair CX430M 430Watts
Case: Cooler Master Elite 110 Cube
This build would be very energy efficient and leave room for a SSD, larger HDD and more RAM later. At this point, I just need it to run the host OS and maybe 1-2 VM's at a time.
Thoughts?
-B
Comments
Basically, the more ram you can afford and stuff the board with the better experience it will be.
8gig of ram + 320gb for storage should be more than enough for the host os + virtual box /vmware player or workstation + a couple guest virtual machines.
-B
You only say budget - not low or high - so I assume you got the cash for a Mac Mini too
Running ESXi 5.5/5.5u1 on Apple Mac Mini + Thunderbolt Ethernet Adapter Caveat | virtuallyGhetto
j/k - will obviously be above budget - but certainly low on power
I didn't even think about a Mini, which would be awesomely compact and cheap to run, but the upgrades would be difficult/expensive.
-A