Peter and anyone else in the same boat, I'll throw out a couple of things to think about here that might go a bit against the grain. First, I'm going to assume you thought about your needs in a realistic way when deciding on the 2200. I believe you have the 1400. The 1400 is a very capable router that can handle any bit that will physically fit in it. The 2200 will fill a relatively small number of tasks that you don't already have covered with the 1400 and other routers. I'm not trying to talk you out of getting the 2200. I think the 2200 fills the space nicely between itself and say the 1010. With the 1400 sitting in the middle there is a ton of overlap. The 2200 is a big investment for someone trying to make money...
All of the above may well be a big waste of your time if you're already as far along in the decision process to be thinking about which accessory kit to buy. When deciding between the two accessory kits I went with the metric. My logic being that the 2200 comes with the insert for pc style two piece guide bushings (that I already have) so adding the metric kit gives me all the options.
Now, going against the grain again, the option between one of these two kits I'll add a third choice, neither. Here's why neither might be the best choice. I seem to only use my 2200 to spin large bits. I don't have a need to run these large bits with the edge guide or on the guide rail. Anytime I need those accessories my 1400 fits bill just fine. Maybe your needs are the same, maybe they aren't. Either way some thought on this question is probably not a bad idea.
Good luck and let us know what you decide on. [thumbs up]