Neil.. when you get there mate you want the R11s trust me.
The faster meter you will get used to and the R11s are far more forgiving. Don't get me wrong i play with the slow meter ball, but not because of the irons meter speed.
I love the slow meter ball for putting. Before they came out with it i was playing the level 33 Cally ball and not having any problems at all. This damn slow meter ball though for putting is addicting i hate to say it... lol.
The big thing in my opinion is the R11 3 iron. This thing is worth its weight in gold. Par 3's that you thought were hard,,, just became birdies. This thing will smack a ball over 240 yards off the tee, and sometime back up..lol. Depending on hole this club from back tee and having plenty wind.... i can't see not having it.
Some legends even tour legend still like the Rockets.... but the R11s have the advantage without any doubt. Fly high... stop on a dime. With Nike ball..... dangerous..hehe.