Thanks (and for your patience). I'll continue to think about it and try to map out the way I think a controller should work in my own words, using your guides as a reference. I'll look into the x-touch mini as well, The NJ studio has always been attractive to me, but I already have a great jog wheel + transport in the Tranzport. But other users might benefit from the NK studio, so I'll give it another look.
Maybe the x-Touch mini + the UC33e for now.... for Sonar. For my workhorses (Live and Maschine) I already have great control surfaces. An interesting idea, if all the controls for prochannel are accessible on the UC33e.... (can the LED on the UC33e be used to indicate control status?)
I guess if I were going to spend the time and effort, I would go with the x-Touch compact, since I don't need the scroll wheel, and it looks like it has all the assignable controls one would ever need for a complete template for Sonar. Are there any downsides? If that were really done right, I think that's what most Sonar users would want anyway.
Klaus apparently made a preset for the x-Touch Compact; do you have it on your site or are you in touch with Klaus?
Finally, maybe a separate controller for the ProChannel along with a couple (or more) of Sonar's inhouse presets (e.g. a standard reverb) would be the way to go.
(I just realized I have TONS of old controllers around that will do MIDI (e.g., a VS-20, a Samson Graphite, apc mini and apc key, TriggerFinger Pro, etc, etc), including an old Contour ShuttlePro I bought for Sonar a long time ago... I thought they went out of business, but apparently they're back again
I'll do an inventory and see - the UC33e was the first thing I thought of, but there is a lot of older stuff that could be put to use.