i had tourances as well, they are great and i have a good mileage with them as well, but for even small muddy conditions they suck big time and they are really expensive comparing to Mitas E-09 that im using now.

http://www.mitas.cz/index.php?strank...&thread=&size=

they both cost like rear tourance, even if you drive it on rain it's still ok if you're not planning your fall rainy tour
Speed is also quite good and vibrations are minimal, only thing is that if you ride it mostly on tarmac forget about grip on dirt roads