The new Academy kit has everything else in the scale beat, from what I've seen. The Airfix G (arguably an E or F also) is okay if you don't mind a lot of filling, but the props don't really match the front of the nacelles. The Hasegawa F/J makes a decent J but it's not quite right as an F, though it's probably a lot easier to build than the Airfix. I've got a DML M which I've never looked at real carefully, so I don't know how good it is, but I've heard others complain about fit. The Hase and Airfix kits art least have the advantage of probably being cheap.
Mark Schynert