So I saw that my local GC had the S88 in stock so I drove over to give it a test. Nope. They have it in the back but not available to demo. The rep tells me that I could always try out a bunch of the other 88-key synths since they're all weighted, too. Thanks, buddy. Real help.
So yeah, I'm liking everything I'm hearing about it, but man. Just don't like the idea of dropping $1K on something I can't try out first.