Don't buy Rosso's - cheaper but they really are pants in the wet as they start to wear. xjay1337 did you have P-Zero or P-Zero Rosso???
A side point; P-Zero's are pants in the snow. I know, I know; not for snow use but with care the Goodyear's can get me off the drive without having to put snow socks on!!!
I had Rossos - But find little consolation, tyre tech has moved on since the PZero.
This is one of the factors that pushed me towards the Goodyear's. As far as I am aware the P-Zero is still exactly the same as the ones that were put on the Pirelli Edition in 2008!
I think the big thing to take from this is that tyre choice has as much to do with the way you use them as the compound and tread pattern. Peoples experience will vary dramatically.
I just find that the part worn Rosso offered very little grip under heavy acceleration in damp conditions. The P-Zero offers a pretty constant level of grip under the same conditions throughout the life of the tyre. Brand new, both are pretty evenly matched and both seemed to wear at the same rate (approx 8000 miles on the front if you like to push them a bit).
As stated before the pressure of the forum (loads of great reviews) made me try the Goodyear's and I couldn't be happier. They are new so have no idea of part-worn performance but they are quieter and don't break traction as easily in dry conditions.
Ultimately buy the P-Zero's; they are awesome. You won't be disappointed.
