996 tire replacement

[smankow]

after seeing the good info in a similar thread (993) I wanted to ask about tires for my 996.  Specifically, R compounds.

Currently, I'm running mpsc's (225/40/18 & 285/30/18) and need to replace them.  Due to camber (lack of), the outer edges are wearing.  I did get around 20+ days from the rear, but only about 13 days or so from the front.

Is it worth staying with these sizes or jumping to 235's in the front?  I like the grip of the mpsc's, but I'm also open for suggestions on other tires, such as the Nitto, Toyo, etc.

Steve