Just ordered a set of BT 32 any reviews out there ?
In the 12 years I've had my ST1300, I've (only) used T30, T31 and now T32's. All GT's.
I've been so thoroughly happy with them, I've never felt the need to try anything else.
They inspire confidence, wet or dry, and wear reasonably well - considering the weight of the ST - and the way I ride

.
I always say "they hug the road like a magnet"...
I have never seen any cupping, or uneven wear on any of them.
I just replaced my T32 rear at just over 11,000 miles, prior to a trip. They were not totally shot, but I didn't feel confident that they would last for a 1,000+ mile trip.
Previous rears, replaced before earlier trips, were changed out around 7.5K - but again, they were not totally gone.
After the trip (1678 miles), I noticed that the front is getting close at about 11K, and will likely replace it next spring - with another T32 GT.