After much ticking around I've finally decided on this beastie to control the Eurorack modular that I've built.
It is an Arturia Beatstep Pro.
Very cool piece of kit, solidly built and it will be a good non-computer alternative to writing electronic music.
It can also control the Elektron devices fairly well.
I've got a couple of these little 'creation stations' on the go at the moment and it is really fruitful in terms of taking me out of my usual way of working.