I'm using 3 Steinberg CMC USB units to control some parts of Sonar X3. they weren't built for Sonar but they sort of work.
IN Cubase 7.5 I can use the CMC units no problem (that's what they were designed for), In Sonar I can use the stop/Play and step buttons on the units okay. Knob CMC unit is a bit more finicky.
Nothing like hitting a physical button to stop playback instead of scrolling across 2 24" screens.
I know, I know - learn the keyboard shortcuts. sorry, I have 4 DAWs too many shortcuts to memorize in each DAW.
the VS-700 is still really expensive even used and it takes a ton of desk top space.