MFC - all the flexibility you need, except expression pedals which come at an added cost (+$100-150ish each) from someone like ME, but the ports are there. $750 in the states.
Kemper's board - not made for the AxeFx, obviously, but I would presume it to be as flexible to their product line as the MFC is to a lot of you guys. $600 in the states.
Line6 POD HD500X - complete flexibility with FAS & KPA (I'm using it with both, simultaneously). I can change presets on both preamps, use scenes, control looper functions, patch in/out multiple effects from either unit with one button, control modifiers and KPA parameters via built in dual-expression pedal (also simultaneously) without an additional cost, setup certain presets to have corresponding switches for more scenes, or fewer scenes and more looper functions, programmable CC's, PC's, you name it... $500 brand new and about half as much on the used market in the states (I got mine brand new at dealer cost, $250, or about 1/4 the price of an MFC & a pairs of ME pedals to have the same functionality). Oh, and it's compact & durable... really durable. I've been using the same one (original HD500, before the "X" model) since they came out, as a controller for multiple rigs with very different setups, including a few tours to Iraq and other shit holes.
I understand that we're all FAS fans here. I am too, but it baffles me how short sighted some can be when it comes to alternative products.
It's not 2013.
