So the initial word on the new Pilot Sport 2s is that they are a hell of a tire. Unfortunately I doesn't look like there will be any 16" sizes. But if you need a 21" Max performance tire you're set There are also a couple of WRX usable 17" sizes and maybe 18s. The prices for the 17s don't seem as bad as I remember the original pilot sports being either.
Here's a little test from Tirerack: