I'll speak for the Michelin A/S tires since I've had a bunch of miles on 'em.
Road noise is way less on the Michelin's and, in my opinion, performance wise (for street) it is great as well. I liked the Potenza's for performance but I was disappointed w/ road noise and the quick wear on tread. I only got 20,000 miles on 'em.
The Michelin tires hug the frikkin road and have much less noise than the Potenza's. However, after driving them for about 35,000 miles the road noise is starting to get worse on the Michelin's due to the wear on the tread. But, that's almost true for any tire as they come to the end of their tread life. Overall, I would highly recommend it as I've driven a lot on these tires. Oh, forgot to mention that these tires will set you back quite a bit. So, if you are on a budget go with the Hankooks. I've read that they are squishier as the side walls are softer.
Poke around the forum. You'll find some interesting stuff.