If you're not watching Jan Beta on a regular basis, you're missing out. I'm fascinated by the C16 - it's another machine I've always wanted, but I really don't know why.
I had a Plus 4 for a while, so I know exactly what to expect from it and it's not a lot. I think it's just the cool black case to be honest. That case might be a cool option to build an emulator setup into.