BucBrew,
You should have no problem with a 1125r. Just ride with the proper attitude or you will get yourself in trouble no matter what you start on.
I started with motorcycle school and then bought a big 1700cc Yamaha (now call Star) Road Star. I traded that in on an even bigger Royal Star. Then bought a Triumph Daytona 1200SE (still have) and then an '08 Kawasaki Concours 14. Every one is big or bigger.
This week I bought an '08 1125r. It is the easiest of all my bikes to ride because it is lightweight and handles so well. IMO the ability to easily balance and maneuver a motorcycle is what makes it easy and safe to ride and the 1125r has this in spades.