Ok, you say your first sport bike. Does this mean you have owned a different motorcycle? Let it be clear that anyone with half a brain can ride a 1000cc sportbike. There is a difference in riding and owning. When you are just riding one around your not going to be getting comfortable on it on that ride. Now when you own one, you will start to think you know what you are doing. This will be long before you actually do. This is not a jab at you, but this is entry level motorcyclist in general. Small mistakes on a 1000cc bike have big consequences. Everyone has a friend of a friend's cousin who bought one for their first bike and did just fine. Yeah, ok, maybe. But statistically that will not be the case for you. I am sure there are plenty of places that will sell you a big bore sportbike as your first bike and think nothing of it. I personally like to sleep at night and not think about the life that I am putting in danger just to make a buck. I wish you the best, but I really hope you will come to the realization that a GSXR1000 may not be the best first bike for you.