I've got Metzeler Roadtec 01, went to 190/55.
Great in all weather conditions, I ride in rain, sleet, hail, even snow on a time or two I forgot to check the weather. Never once felt myself lose traction on them, mind you I make sure I'm riding for the conditions anyway.
Very happy with the 190/55. I honestly don't recall how the stock felt even, but I remember immediately liking the new turn in better. It's about time for a new rear for me, I'll double check the miles later, but I'm pretty sure I'm pushing, if not exceeded 10,000 miles on this tire.
One downside, the front tread pattern makes a lot more noise, and a tiny bit of vibration, I can make it about an hour non-stop highway before I have to shake out my right hand from it.