Welcome to the forum!
S1000RR?s are amazing bikes. Gen 3?s are very well sorted, on account of being the final version of the original platform.
There have been some issues with the Gen 4 bikes, but the BMW warranty is rock solid and the dealership experience is generally excellent.
Best of luck deciding between the two, but whatever you decide I?m sure you?ll be throughly impressed [emoji41]
Enjoy the forum [emoji846]