I currently have a hosted server with the following specs that I'd like to replicate/move to my home/office:

 

• Dell PowerEdge M600
• 2 x Quad Core Xeon L5430 Processor
• 2 x 500GB SATA (RAID 1)
• 16GB RAM
• Windows Server 2012 Standard

I use the server as a dev workstation and usually have at least 3x VMs running in VMWare Workstation.

 

• PFSense (Router, Firewall, VPN)
• 2x Windows 8 VMs (Development, Graphics etc)

This server works pretty well for what I'm doing now (no gaming, heaving graphics etc) however I would also like to up-spec a bit in order to be able to run a few more VMs simultaneously:

 

• PFSense (Home UFB Router, Firewall, VPN)
• FreeNAS (Plex Media Server, NAS etc)
• 3-4x Windows 8 VMs
• 1-2x Linux VMs (small web server)

The new specs I'd be looking at are around:

 

• Form: Tower PC (not rack mount)
• CPU / MB: Unsure whether to keep dual CPUs or go more cores but need a bit more power than what I've got now? TPM would be ideal.
• RAM: ~32GB
• OS RAID1: 2x 64-128GB SSD
• VM RAID1: 2x 2-4TB SATA
• Storage RAID1: 2x 2-4TB SATA
• OS: I'm pretty sure I'm not currently using any special features of Windows Server 2012 so should I be safe to stick with Windows 8??

I'm looking for mainly for recommendations on a CPU / Motherboard combination that will do the job and possibly be able to handle the 3x RAID1 arrays without an external controller (doesn't need to be bullet-proof or 100% up-time, just fairly resilient so I can swap out a bad disk without too much hassle).

Cheers