Re: Dual-WAN router with the following:

There is a company making rack mount kits for the ErgeMax Lite, ISP Supplies is selling it:

http://www.ispsupplies.com/brands/wg-AM3G18-120-K/KAM-Fab-UB-RM1.html

So you could rackmount the ERLite as well.

The rack mount adapter I bought is a slightly different version that lets you mount two ERLite side by side in a 2U space in your rack:

http://www.ispsupplies.com/brands/wg-AM3G18-120-K/KAM-Fabrication-TS-8-PRO-Rackmount.html

I find it very convenient to have a backup unit mounted and ready to take over (move wires and install latest config) should the main unit fail for whatever reason.

Oh and just for the record, I'm in no way affiliated with ISPSupplies other than that I bought a rackmount unit from them.