I purchased a Rocktron Midi Raider and a Mission pedal (Kemper green of course..) in the Black Friday sales a few months back. Total came to around $675.00 US$
I'm going to miss the Screen down at my feet showing the Kemper display, but the Midi Raider allows me a certain level of flexibility in regards to what it can control on the Kemper. I'm also using it to control a POD HD500 Rackmount unit inserted in the Kemper FX loop. The POD is changing guitars on my JTV Variax as well as supplying some different FX not available on the Kemper.
Gonna go with this system until I either find a better reason to switch to the Kemper Foot Controller...or my Gear Acquisition Syndrome gets the better of me.