Sonar growing on me....
Tried it earlier in the year but the upgrade price ($300 for me at the time) was too just too much in my opinion. Come summer, I received the $120 offer and decided to bite.
To make a long story short, I'm getting the hang of Sonar (not easy being a Reaper user where everything is 'manually' done - it has its advantages!). The ProChannel is very convenient and there is a whole lot of little features that prove vey convenient and accelerate the workflow tremendously.
Very excited and impressed. Lots to learn and explore, but the process is very pleasant so far. Money well spent. Happy camper here...lol...