Rob,
Unfortunately none of the current control surfaces are integrating flawlessly in the Sonar X series.
My Tascam is still very "usable", but as Tascam indicated that Win 7 will be the last supported OS, and Win 8 changes the firewire protocol once again, the Tascam will no doubt soon be obsolete.
I keep hoping that the VS-700 will become the Sonar "flagship" again, or that full Mackie support will once again be "important" to Cake.
But, it looks like "touch" will be the wave of the future.
I guess in future we will all have a flat screen on the desktop for the Console view.
Yours in the quest,
Tom