oneeyedjohn: I'm in exactly the same quandary but my game is shite so there is no question I expect these clubs to improve my accuracy
The 2.0's may or may not improve your accuracy. The faster meter is a challenge, especially at first. Where they excel is in throwing darts. When you do have a long iron, and ding it with the right spin, you are looking at a pretty easy birdie. Just expect more missed greens for awhile.
The other big difference, to me, is that you lose more distance control when you take swing at anything other than full. The G-10's gave you a lot more leniency for such shots. With the 2.0, at least to me, you are better off hitting full and using topspin/backspin to make up for distance gaps.