I'm a long time Sonar user (v2.0) and supporter.
I have access to and use a PTHD rig from time to time.
The only way I can put this is that PT is akin to Yamaha NS10 studio monitors. They're industry standard but not necessarily the best.
And everytime I come home to my studio I feel total satisfaction that Sonar is an innovative, forward thinking product rather than a product trying to keep up!
They day will come when large studios use Sonar, I just hope it's a stable and reliable version!!