Advice on Microserver Specs for home test lab

Am currently using a laptop at the momment for MCSA Windows 7 (70-680 & 70-686) training using Vmware to build and test machines, but installing Windows server,exchange server,Vsphere etc on the laptop made it slow most times freezes for a while running vms simultaneously.
I am considering buying a used HP proliant Microserver or similar for labbing running Servers, My aim is to build a full functioning Servers for labbing to emulate a live site running windows server,exchange etc troubleshooting,installing, breaking and fixing problems too. I also preparing for MCSA - MCSE certification to once I pass my Windows 7 cert.
Please advice on minimum specs for a Microserver I should buy e.g model,ram size, minimum specs that can handle what I require for training.
Thanks.
I am considering buying a used HP proliant Microserver or similar for labbing running Servers, My aim is to build a full functioning Servers for labbing to emulate a live site running windows server,exchange etc troubleshooting,installing, breaking and fixing problems too. I also preparing for MCSA - MCSE certification to once I pass my Windows 7 cert.
Please advice on minimum specs for a Microserver I should buy e.g model,ram size, minimum specs that can handle what I require for training.
Thanks.
Comments
How to upgrade to the MCSA: Windows Server 2012 certificationYou can upgrade these certifications to the MCSA: Windows Server 2012 certification.
My laptop is an i7 2.0GHZ 500GB 8GB RAM, I have got loads of application running I guess I will increase the ram to 16GB instead has you adviced.
Taking the 680 + 685 or 686 will give you MCITP, and MCSA. The MCITP title will be different depending on which exam you take though. Taking the 686 does allow an upgrade path to 2012 as he said. You could also upgrade to MCSA in Windows 8 if you wanted to by taking either one.
https://www.microsoft.com/learning/en-us/mcitp-certification.aspx
Unless their website has incorrect information on it...