I record bands/artists on a regional scale here in my home studio. I have used Sonar since my first switch from analog tape to a DAW. I feel that my recordings sound "Professional" and, I am happy with Sonar (Sonar Platinum at this point).
One song I recorded by The Paul Allens made it into the Red Band Trailer for the Matthew McConaughey movie, "Killer Joe". I have many bands I have recorded with my Sonar system doing just fine and selling lots of their albums. One of those bands has been opening for several major acts (they have opened for The Pretty Wreckless, Bon Jovi, etc.) and no one has ever not bought their album because it was recorded on Sonar.
I can also attest to the fact that my buddy here on this forum, "chuckebaby", is consistently recording very professional projects on Sonar.
Personally, I think Cakewalk needs to up their marketing game. They need higher visibility. I agree that there needs to be more in depth videos on Sonar Platinum out there. Hands on videos of people using Sonar in the studio, recording actual bands would be nice, etc.
Bottom line, Sonar Platinum is a great DAW. Yes, there are a few things I wish it had that it doesn't but, I believe that can be said about most any DAW.
Also, to the original poster, "PJH".... I heard your song the other day on the Recording Mag site.... Awesome job! Sonar certainly didn't hinder your results in any way!
(Here's link to the "Killer Joe" trailer. Warning! Explicit language!)
https://www.youtube.com/watch?v=7M12DPZgW_E