Have the white regular AT in 41mm and sold my blue dial AT GMT which apparently was 41mm instead of 43mm. If you don't care about getting called out (no one ever cared for my reps/gens and I doubt that others experience anything different) I'd say go for the current 41mm GMT, I will buy one as long they are still out. 43mm will be just too big imho, 41mm is the perfect size for this case.