[fizzwheel]

I've ridden a GSXR-600 and I own a GSXR-750, 750 has a nice dollop of midrange over the 600, not that the 600 doesnt have any, its just that you can ride the 750 in a more lazy way, i.e it'll pull on OK in 6th without needing to stir the gearbox, but if you do stir the gearbox you've got alot of power available as long as your in the right gear.

I've a K5-750, you can pick them up for reasonable money anywhere in the 3 - 4k range now. I still think its the best looking GSXR. But as for which model to get depends on your budget. Personally I'd say the 750 gives a nice balance between the rev happyness of a 600 and the torque and midrange that you get from a litre bike. So thats what I'd say you oughta go for.

I've done touring trips with luggage and fast road rides, its very flexable and it'll do anything. I've not done so, but from what I've read on the gixerjunkies.com forum its a very capable track bike as well.