I have never had a pressure cooker and am thinking of investing in one. I have noted on this board that many have Fagor, but the salespersons at other stores Sur La Table especially have been recommending the Kuhn Rikon. Which do you folks prefer? Also, there are only two of us at home, although we don't mind cooking enough for two meals, nevertheless storage is an issue so we need some recommendation for the best size. Ideas?