SpeedyKiwi is correct- except a Triumph Daytona 675 will eat up a 1400 in the twisties! Buse's and ZZR's are godd for one thing- going really fereakin fast - straight.
I rode a Thruxton on Friday. A completly different bike than the speedmaster. I absolutely loved it. It had D&Ds, CRII carbs, NARK and some mild head work. It would flat out rip! Not speed triple territority by any means, but perhaps the coolest all around bike I have ever ridden. It has quite a unique vibe to it. But, definately an in-town bike. I was begining to get uncomfortable after about 20 minutes on it.
It has a different cam profile thatn the AM or the SM. might be another option...