Try the 11's, and if they are a bit too much, stick some 10's on there and rock it. I would say that give it a chance for hands to adjust. If you have played 9's forever it might take a little while to get used to a heavier gauge. I think once you get used to the heavier gauge you will not go back to 9's. I used to play 9's too and once I switched to 10's I never went back!
I'll post back once I have played my Valentine a bit! I'm pretty excited to get it today. Christmas in April. lol