There are some fantastic features is Studio One 3.
But there are also fantastic features in Sonar.
Sonar, to me, has the best interface on the planet barring none.
All DAW's have their strengths and their weaknesses...it comes down
to your workflow and preference, and the type of work you are using it for
in some instances.
I strive to keep ALL (major) DAW's in front of me...to learn the basics of all of them.
They all do the basically the same thing. It's just "how they get there" that is different,
and some of the features that they offer.
The Grass isn't always greener...it's just "newer" and "different" and that is the attraction
for the most part.
I've always said "If I could have the interface of Sonar, the features of Cubase and Studio One, and the stability
of Logic all in one package, I'd be a happy camper" (Sonar has been rock solid btw-so that's a good thing)
I own both Studio One 3 Professional and Sonar Platinum. I like them both...bot Sonar is my home.
( I also have Cubase, Pro Tools, Digital Performer, Harrison Mixbus, Mixcraft Pro Studio, etc... No Logic, I'm not a Mac guy...but if it was out there for Windows I'd sure kick the tires and give it a spin.)