Just to report on the T30's, I think they are a brilliant tyre,they heat up quick,the grip is fantastic,they seem to have stiffer sidewalls anyway the bike feels more comfortable if that makes sense. The GT front should last longer,we'll see.
Ditto and double ditto... Have them on for a couple thousand miles now and they really do seem to be a stellar fit for the ST1300. Stiff wall makes the handle bumps better, turn in is so pleasant and confidant inspiring, rode in some good down pours and excellent handling of the rain. I am really aggressive in the twisties and love the way they take them. No head shake at all and quieter then the others. I would say, if not the best , at least one of the best tires out there for the ST. Previous tires, Avons, Michelin P3's, Metzler Z6 and Z6 Interact.
Oh, forgot to mention...Price is GREAT!
Only thing left is to see how they wear over time.