KPR + Mission pedal = 650€....will need to re-think the benefits over HD500 whether it is worth it..
Check out the Rocktron Hex, that @michaelmellner linked to in another thread. Looks as sturdy as Mission's pedals, although it doesn't have the switch of the dedicated EP1-KP. On the other hand, it also functions as a conventional analogue volume pedal and is half the price
Cheers,
Sam