lol get a 600, if its not "enough" bike for you, you're not riding it the way it was meant to be ridden. I smoke 1200 sportsters in 1st gear all day long and same with softails, fatboys, shadows, etc... Any of the common sportbikes are going to handle great compared to a cruiser and unless you start taking track day lessons, I don't think you'll notice a difference between the models, just that you can carve way better through turns than you could with a cruiser. I wouldn't get a katana, just because they're not fuel injected from what I remember and if you ever want to sell it you might have a hard time getting rid of it.