Don't you need a midi controller for the RKM too? I'm not very savvy in that regard. For me, the little details of the Volante, especially the analog saturation where all the other mega delays just use code, make it more musically desirable for me. It goes deeper into one type of sound rather than wider like the others, but with as much playability. Honestly I was expecting it to be a hundred bucks more when I first saw it.