cinellipro

I own a 1999 996 NB that I use as my daily driver. It has the original 17x7 and 17x9 twist wheels and I recently discovered there is an 18x10 version of this OEM wheel. I read the offset is 65mm and would like to use this in the rear while keeping the original in front (or possibly moving the 17x9s to the front?).
I want to maintain the same OEM look and am wondering if anyone has these Twist II 18x10s on their car and what would be the widest reasonable size I can get away with. I’ll confess that I like meaty rear tires. 295s? 305s? 315s?
Photos would be nice. Cheers!