A lot of the racers seem to swap the standard 120/60 for the 120/70 for faster turn-in and a bigger footprint when banked over (I think).
If you go for sports touring tyres and can get the new Pirelli Angel ST in a 160 then I'd recommend them to anyone! They're the latest tyres out and so far their claims to being the best are entirely believable. toad-loads of grip dry or wet and good for scraping pegs 2 corners from your driveway first thing in the morning!
Plus you get the funky angel pattern in the tread that changes to a demon after a few miles...