I actually find the 60/40 meter to be very accurate; competitive with my FA, and that has a matrix meter in it. For an FM3a, the AI lenses are fine things. I have the 85/1.8 AF-D, the 105/2.5 AI, and the 135/2.8 AIs. Of them probably my favorite is actually the 85 because of the speed, but the 105 is hard to beat. I don't use the 135 much any more because I have the shorter ones. I find I usually prefer prime lenses for portraiture, but that's probably because most of mine is done under available light conditions where the more light the better.