"they are durable and they are cheap"
The 12 gauge Field may be cheap but purchase a Midas Grade or any 20 and the price is comparable to any fine gun. Not many people have seen the Exhibition Superposed of the 1960's and 1970's. As fine a double ever made anywhere and anytime.
The 20 gauge Superlights actually started at 5# 10oz in the 26&1/2"(65cm) (there were a few 28" made) but when Browning began making them again in 1980's the weight had gone to around 6#'s. 12 gauge Superlights were 6# 8oz and probably the best of all of them for upland work. You jsu can't find all steel o/u's in that weight range today. To get that light the manufacturers have resorted to aluminum alloys. I retain one 20 Superlight because it is so light, a 12 Magnum and a Lightening Trap. All the rest are gone. The 12 Magnum 30" F/F with Kent TM #1 is deadly on pass shooting geese but try to find Kent TM.-Dick