I did a sound mix for an indie film a few years ago, but because Sonar's video implementation didn't really cut the cake for that sort of thing, I ended up using Audition as the host and RX3 as an outside app to clean up the dialogue tracks. And boy, what a hassle that process was. I had to export the clips and manually open them one at a time inside RX3, making sure to save the processed audio with the same file name so it would refresh correctly within Audition.
I'd mostly use RX3 and maybe Audition in some scenarios, so I guess we'll see how that workflow goes!
Thanks for the info, looking forward to trying it out.