You are wicked insane for driving in snow on Potenzas. I know this because I have been caught out in the snow like three times on them and NEVER AGAIN. Holy s*** it was a nightmare. You just CANT stop. I got 16 steelies and Semperi Winter Radials...not bad. Cost me like 500 something. But without those potenzas you lose so much performance. Winter sucks ass.
205/55/16 on the MSP. They clear, no problem, are only like 1/8" larger dia. than stock. I have 'em and no problems. If you want good style, check on a set of MP5 or ES 16" rims, they work and fit great (as OE should...)
I went with the Semperits on tires.com and love 'em. The MSP is great in the snow with the LSD and ABS, and the ground clearance is pretty good, esp. for this type of car.
Do a search for "snow" or "snow tires" for more info. www.tirerack.com has GREAT information on the different types of tires, and some snow comparos (but doesn't carry Semperit - and tirerack's prices can be high on snows).
yeah, when i drove my MSP home from PA, to MO, i hit some back mountain roads in PA and some spots of road were covered in snow, sucked all hell, was scary as s***, just had to keep wiggling the wheel left and right to keep the car going straight.