On my Q, I have used the original OEM Michelin XGT (good in dry, bad in wet), Bridgestone RE940 (good in dry and wet, but sidewall went catastrophically well before the tread wore out - fortunately, I was not at high speed) and non-OEM Michelin XGT (decent in dry, bad in wet conditions, more roll than OEM).
Recently, I have put Firestone SZ50EP on my Q (in a 15" size) and think these are the best tires I have ever used - in over 25 years of driving! They handle well, are outstanding in wet braking (as I discovered today for the first time!), are super quiet on the highway, etc. I cannot say enough good things about the Firestone!
Z