Hmn... tommorow is the last day of the Sonar 5 Studio upgrade offer and I'm humming and haa-ing about upgrading. Thing is, eXT is covering so much ground, and aside from some CC-editing issues that eXT has, XT2 is looking good. As far as I know, the way you've suggested might already work in Home Studio (depending on the track preset functionality), so I don't know if I can justify the upgrade. Hehe, I'll sleep on it.
Or maybe wait for Sonar 6...