Follow up: Ozone5 works very well in C6.5.5. I also works fine in WLE8, however it gets a bit sticky as you adjust something in Ozone5 and then try to start/stop the playback of the project. At this point you have to actually click on the wave file in the project. Eh, a bit of a drag but not a deal breaker for me. I may end up with Ozone5. 
Some have reported that it uses some computing power and I agree, IT DOES. However, with a little thought I could see running two instances of Ozone5 in Cubase on the Master bus, one as a Master Limiter and another as a dither. Eh, YMMV. Also, in my case, I would save the dither program for WLE8. Of course there are many ways to use a valuable plugin that is resource heavy if you are inclined. I can maybe see doing separate submixes for drums, vocal, and guitar with Ozone5 and then bringing them back into the project for a mixdown. I do like the sound of the presets for these various instruments, yes.
Oh well, let me know how you are doing with it.