No ARA is a con but I think that Cubase uses Zplane Elastique technology for audio pitch shifting and harmonizing, which is excellent too.
The biggest con for me are the dongle and the non-coloured strips, but when I look at the user interface, I like it, and the chord track is huge!
So let me think about it for 2 or 3 days please, I'm almost convinced by Cubase Pro. I think I'll use it for my new projects and keep SONAR for the others.