Soundwise
Limiter #6.
I avoided it for a long time because the GUI seemed unfriendly and cluttered. Now it's the main option for a limiter i almost every project.
My favorite limiter too, and I have few good ones.
After reading what Bat is going for here I would say ARC 2, but I know he has it already.
A great EQ with mid-side is a nice thing to add. Sonar doesn't have one yet. (The new one coming this year may have mid-side IDK).
I have the original Pro-Q and Melda's Mautodynamiceq...both are great choices.