If it were me and just starting out looking for a new set, I would definitely take the advice of 19hole and get fitted for everything from the driver on down. I found out that being fitted makes all the difference in the world and will lower your score before anything else. Like a lot of people, we never hear about fitting until it is too late, but now knowing about it now, I wouldn't do anything else. That is the reason I was fitted for my irons, AP2s, and am looking foreward to getting fitted for a new driver and others down the road.
Best of luck on your choices.