Congratulations on your purchase! That's quite a setup you've got there!
The best I can tell, the 94/a's drivers are sealed in a cast basket... but if I'm not mistaken, it's not completely enclosed/sealed like the RSS and RLS series.
I'll be using a 7.1 setup as well and went with 4x RSS III's for surrounds/rears. The surrounds will be in ceiling and the rears will be in-wall.
If you have a local dealer, you might drop in and see if they have any of the 94/a's and give them a test run.
I initially decided on going with the 94/a's based on my budget but I quickly talked myself out of that. Just told myself if you're going to do it, do it once, and do it right. It's better in the long run to get what you want and be done with it and not worry about second guessing anything, ya know?
Plus, the RSS III's are enclosed and bipolar. My room is a bit spacious so I'm after a wider and evenly spread sound.
I did the same thing on trying to decide on a receiver. Initially, it was a Denon AVR-3313. Then an Onkyo TX-NR818. Then a Marantz SR6007. Finally ended up purchasing a Pioneer Elite SC-65.
My first post on here, I was all settled with a Bose V35 Lifestyle System and an 80" Sharp 3D HDTV. Ready to drop $7-8k on those alone. The member ack_bk helped me out a lot and I ended up spending less money on a much better and COMPLETE home theater system.
Good luck to you in your decision making!