Hello and welcome to the mad house!
height in itself wont be too much of a handicap , but if you've a short inside leg (less than 30"?) you'll find it a stretch on any "standard" Duke except a 600 monster, which have smaller stance anyway. Kev's idea of "cutting down" a bike to fit will work but may affect the bikes handling. Get yourself down to your nearest dealers and try some out for size, if you can barely touch the floor with your toes then you'll possibly get away with just cutting the saddle down, otherwise it'll be a case of careful adjustment of the forks in the yokes and lowering the rear ride height until the balls of you're feet (in biking boots!) are firmly on the ground.
Lots of people "get by" with tip-toeing around on a bike thats too tall for them and feel quite happy, I'd want a bit more security in having a good "dab" available, especially after last night eh Mel
