From reading his previous posts, I think he likes the GUI.I recommend that you move off of Proxmox, and move into something less GUI-dependent (Debian, CentOS, etc.)
I posted this in your other thread. Change the 2x pfsense boxes to Rangeley with ESXi 5.5 and pfsense in VMs. That gives you the 4x NICs you need and have in your current setup.
Have 2x 1U short depth chassis for the ESXi/ pfsense. Use USB storage for them. Make 2x USB so if one drive dies you can boot off the other. Make little VMs in them with big 3TB drives which you can mirror and use as backup.
Behind those have your Hyper-V cluster. Use a single C6100. If the C6100 goes down, you could probably run off of one of the ESXi/ pfsense boxes for awhile. Wordpress/ vbulletin have tons of cached pages so not too bad on processors for sites like this.
If you do that, you are all set at a very low cost. You could probably sell one running and one spare C6100's that are in there too. You'll end up with 2U full free. 2U that you could probably put short-depth chassis into one side. I'd also venture to guess that filling a C6100 with 4 instead of 3 active nodes would be more efficient and you could offload the other C6100.
I'd bet in the process, you would have more free space PLUS (and here is the big one) you would save 1.5-2A of your 5A limit. You would still get your GUI. pfsense on ESXi and P2V for that is absolutely trivial.
Only thing you might have if Proxmox is sucking is the potential that you get a few minutes of downtime while you move the 2x C6100 nodes to the other chassis. Since you do this enough, <10 minutes of downtime.