Hi Jack, i would definitely recommend getting the r11 irons, as they are the best in the game and will help you birdie more holes.
I used the top level g20 irons and was a bit hesitant to get the r11s because of the faster meter. So what i did was switch from the cally balls to the nike balls, once i got the r11s to help offset the difference in speed.
It might behoove you to consider using a ball with more feel to slow the meter down if you do decide on the r11 irons.
Good luck
Fore