Frankly, I would not waste my money on Sonar. I have producer 8 issues in Vista. My Rapture synth for Sonar, sold by Cakewalk and touted as totally Vista compatible won't even run. I have been with them for some time but each issue seems to have more config issues than the former. And as a Roland user of several devices, we all know they make the best gear and worst manuals on the planet--and now Cakewalk is Roland.
And the email support is ridiculous. You have to submit a complete new form each time instead of entering into a back and forth dialogue with the support tech--and forget the phone.