Short answer George: NONE.
And I'm not being cute either. Until your preferred software provider has a "hands-on" course option (ie the software is released and you can play with it), its pointless to go to a class.
I sat through the useless ACI Acts presentation (could not see a single thing on her laptop screen set up at the end of the table), and the even more useless Fannie all-day 'UAD 3.6 Flying Appraisal Monkeys Show' (well, I did get 7 CE credits, so that was somewhat useful at least) - but again - you didn't have it on a laptop in front of you to follow along, and you could not read a single line on their Power Point screen.
My advice for you is to "Keep your powder dry" til you have something in-hand to play with - especially since, as you said, you might never even use it.