We have a couple of dozen 9608s out and they are working just fine. Couple of odd things, but nothing insurmountable. We have a small system that should be going in now and we really don't care for the 9620 phones as much (have to navigate for everything instead of just pressing a button). And even though they're on sales hold, I'm thinking of using the 9608 phones anyway. I know that it won't be a supported install. What would you do?