Agreed, I LOVE the stance on my wagon now.
But the real improvement was in the handling. Much more controlled, not so wallowy. I'm working on getting a set of SPT/STi V7 wagon struts and I'll let everyone know how they work out. BUt I agree with John, the stock struts are a touch underdamped for these springs.
AFAIK, Prodrive just make one set of springs for the WRX, both sedan and wagon.
Alignment, my front is dialed in as far as they could get it...and I could just barely get -1.0°. The rear is out slightly, but not enough to get out of the factory specs (on MY car). I'd actually like a bit more camber in the rear, so I'll prolly get some anyways.
I'm also running zero toe f/r. And I've got similar driving habits to yours
HTH
mike