With the ammount of R&D that goes into these bikes you think a size up would increase performance?? Just teasing...
If you go to a 190 you WILL gain straight line stability but will in turn suffer from much slower turn-in and your bike won't be as nible handling. Besides, the bigger your contact patch, the worse your fuel economy, if that matters to you.
There are many tire options out there... you gotta decide what you want; Mialage, traction or mix of the two. Mialage go BT010/BT020 combo, stick go with Rennsports. A good mix of the two, Metzeler Sportteck M-1. From personal experiance thus far, Dunlop tires are below par when compared to their direct competitors.