Are you looking for an All Season tire, or a summer tire? You asked about one of each. You have to be careful to clarify asking for opinions on a forum, and ask followup questions.
The Proxes 4's are great- for an all season tire. They are awesome on my LX, but I would guess the MSP can overpower their traction at the limit, and they have a softer sidewall (add psi). My Proxes 4's work great and after 32K miles I haven't had any aggresive driving problems wet, dry, or both, including some autox (except for launch and uphill start problems with ice and deeper snow). Personally I'm switching to Ziex 512's in October for my winter tire and KDW2's for summer.
A summer tire (Fuzion ZRi) will of course be better in theory. You could also look at:
http://www.msprotege.com/forum/showthread.php?t=100697&highlight=tire+comparison
Noclue- was comparing your shoices to Potenza S-03 (I can only guess since he didn't say) which is a max summer tire and quite expensive. I hope he wasn't talking about the Potenza RE-92!
DeanSweet- I think was talking about the older FZ4.