Looking to purchase sportbike. Last year was my first year of riding. I had an 89' Cbr 600. This year I'm looking to get into a newer sportbike. Like 04' or newer. Also looking to upgrade to 1000cc. Just wondering what the differences would be between yamaha r1, Honda Cbr 1000, Suzuki gsxr 1000, and Kawasaki ninja 1000. Whats the best? I understand that the proformance of these bikes would be nearly identical. I'm just wondering your opinions. Also if there are any true differences between these bikes like smooth ride, fuel efficiency, etc. Thanks.