AE212 sounds very nice with most heads I've had the pleasure to hear it with. IMO, it speaks beautifully with the F500, and quite a few are raving about the Shuttle 9. That cab, IMO likes the 'relatively tight and relatively bright' of both of those heads.
The Puma is cool, but is so wide and smooth that it can be a bit much on the gig IMO. And the cost of those in the US has gotten a bit stupid. Beautiful sounding head for that 'Anthony Jackson' type thing though!
I would think the new Max 9 would totally kill with the AE212 or 410... the nice power spec of the Shuttle 9, with the much expanded EQ section of the Max heads. KILLER spec there. If I was not already so pleased with my current line-up, I'd strongly consider the Max 9 for my tone goals. The Streamliner 'should' be something quite different from most of the lightweight heads out there and the current Genz line... we shall see. I put the first order in with the retailer who supposedly put the first order in with Genz (RocketMusic), which means I should have my Streamliner very early in the release window