I am running a test on a RB750Gr3 (hEX) where certain classes of traffic are prioritized more than others, such as VoIP. As I understand it, I am supposed to use mangle and a pair of queue trees. It seems the hardware maxes out at something in the ballpark of 100M-170M half-duplex in such a context. Or something like that.

Which models support queue trees at "full-duplex 1000M+ down and 1000M+ up" speeds? I see that 'simple queue' performance data is provided for all models. Simple queues are wicked fast, yet don't seem correct for my context.

I would love to hear your input!

When you mangle you are inspecting every packet so the CPU in those Hex's will start to max out quite quickly, yes they are brilliant for the price but the VPN performance is in part to the HW offloading. You need something with more CPU power.

As a minimum you would want an RB3011, better yet an RB1100AHx4 or even better again a CCR.

My recommendation would always be to go for CCR if you are going to start getting CPU heavy.