Tires MICHELIN or OEM BMW

I've gotten Michelin Pilots fitted and can't go wrong, they're pretty decent tires.

+1 on PSS. Best all around tire with a perfect blend of dry and wet grip, turn in response, longevity, road noise, etc. I'm going to be grabbing my second set in a few days after getting 22,000 miles on my first.

I run Michelin X-Ice on my stock 17" wheels.

I've had very good luck when I have michelins on the car. Much better grip/wear/noise than the factory goodyears.

Michelin is better than Pirelli IMHO. I've had Michelin PSS tires on my Audi and they are great performers.

Tire technology keeps getting better and better, I guess the new Michelin PSS vs the old Pilot Sports is a good example. Better grip + better tire life, who could ask for more?

I've gotten close to 40k out of a set of PSS.

I'm guessing I'll probably be able to get about 25k miles out of my PSS.

OP said: semi-slick Michelin Sport Cup 2

I have the same Michelin tires, and they are fine tires if you drive the speed limit and not have to make any sudden stops... It is reasonably quiet, and handles pretty well in the dry and wet. These tires even got me home during a few snow storms, but almost got stuck on an ice covered hill, but managed to get out of that mess with some careful driving.