It's only the office stuff that needs PoE (assuming we end up with the same phones as the papers) and that's going to be pegged at 100Mb anyway. Anyone wanting/needing GigE would probably have to forgo PoE and power a phone from a wall wart.

I'm liking the idea of the chassis based approach. The only issue I have is that the office stuff is on two different floors, so I'd probably have to have two chassis and link them with 10GigE trunked interconnects.