The cab filters in my MP2 just doesn't do it; they're ok when used powered speakers, but not with cans/plugs, which I need to use in my current living quarters.
I would prefer a TwoNotes C.A.B., but it's a Bit on the expensive side, so I've been thinking of the Moer Radar.
It does a fine job (check out Thorn's fine review on the tube), just doesn't have MIDI.. but then again, when using a real amp/cab we don't switch sound with each preset anyways, so..
It doesn't do amp sims, just cabs, but then again, I think the combination of my MP2 with the right tubes (long plate in v2 pos) and the Radar ought to work just fine, especially when finalized by an old soft-knee compressor/limiter I scooped up.
These devices are all mono, so I'd simply arrange a separate mono send/return loop after the gain states and EQ in the MP2; peace of cake)
Comments needed on the Radar and potential other devices.