Grobut, that is a very good point, and a very reasonable answer, if we were discussing the merits of the AK47 over later models, AK74, AIMs etc.
But as to getting an airsoft replica, surely the only real question is to which weapon you like the LOOK of most?
I know you were asked the specific question, so please don't take this as a dig against you But I personally prefer the look of the AK47, the 'classic' the original, so that's what I wanted to go for.
Sure, the fact that there isn't a readily availible, perfect representation, but I still like it