I lowered my 09 a year ago, I did 1" lower progressive springs in the tubes, and 1" lower progressives in the rear. I did it because I'm short. I had my seat reworked to make it about a half inch lower also.
I have never had a problem with cornering. I'm not an overly agressive rider.
I haven't been able to rub the pegs, however the kickstand rubs on some speed bumps when riding two up.
You will need to adjust the kickstand, but that's not a big deal if you have access to a torch.
Visually you won't notice much of a difference.