ST's-Ducati's wolf in sheeps clothing, most people are VERY suprised how fast one of these can be, both on the road and the track. Fast and comfortable(for a Ducati)-get one-you won't be disapointed. ST2 is good for about 130 which is fast enough for most people but it does get a bit breathless up th top end but has plenty of low down grunt. ST4 is good for about 145-150, very smooth and revvy, good top end. ST4S-now that's an animal, loads of low down grunt, but when you open it up and let it rev it's 'oh my god' time.
I have an ST4S-nuf said!
John