They hit alright.... Nothing that's gonna shake or rattle your car. I like them because of what you said - weight savings and they do sound pretty good. they are also getting 300 watts (so 150 a piece).
I bought mine from ubid last year. They were brand new and it think they are both $110 or $120 shipped - somewhere around there. I had the older 1st gen 6x9 free airs before and sold them a while back when I replaced them with the newer ones (lie the ones in the yahoo auction).
That yahoo auction is crap and I would never trust it. Just keep checing the 2 places I said.