My thoughts
I really like the Metzelers. Unfortunately I got a couple of the out-of-round rear tires that had to be replaced, but my guess is that while Metzeler is getting ready to do their next run they will have taken care of theis problem. Often the rear tire can make one think they have a problem with the front. Best way to tell is if you have a wobble or vibration that is outside of the "normal" 35-45 mile range. I could tell I had a problem starting from zero.
That being said, when you have a good set of Metz on, they can't be beat, both in handling and wear. I run the Metz on my Valk (get less mileage on the Valk tires, however) and always felt very secure in the turns, which I have been known to hit pretty hard. On the Wing, the tires handle great also and they get better mileage. I have aobut 14k on the front and have another few K left. Rear has about 8k on it and looks almost new. So, yes, very pleased.
NOTE: All of these front tires that have tread that twist to the left or right will cup. The rear does not do it too much, since you have both acceleration and deceleration (braking) forces to keep the wear on both ends of the twist. Since the front tire has only deceleration forces, it "cups" where the braking forces are applied. I prefer this tread design since it handles better on roads that have been grooved and also on steel grate surfaces.
My original tires were the Bridgestones and I got about 10k out of them -- had about 2k left but I was starting a trip and replaced them. They were okay, but did not handle nearly as well as the Metz in my opinion. Good luck in your decision.