Metzeler have always been a good tyre but i've found lately that Michelin are ahead of the game.
The T30's...do you fully use what they offer or find the ATC always activating regardless of setting....i often found Bridgestones a bit plastic and wouldn't be in my top 5 manufacturers
I'm using the PR4's after using the Pilot Pure's...can't find the limits of either and the better wet / cold grip of the PR4's wins my vote.
If your not doing track or wet runs then the M7rr is a top tyre that offers a good balance of grip to mileage.