I have not seen enough of Higuain apart from several youtube videos. There seems as if there is a lot to like. He is tall 1.84m, skilled, has a fantastic goal scoring ratio, and some people say he is quite pacy as well and he is still 25.
Downside? Price. Man City and perhaps PSG are rumoured to be interested. I have no idea what his transfer fee would be. Some here are talking mid 20s. Based on his stats, age and abilities that may seem fair. The danger is that Man City will bid more. Key question is surrounding Cavani because it seems that he is Man City's main target. If Napoli sell him to Man City, then the deal is all the more possible. PSG may not be desperate to get him if they manage to keep Ibrahimovic.
Ibra is more of an iron clad prospect for Juventus but he is more of a shorter term solution. Higuain is a long term solution being 6 years younger and with similar skills that will only improve because he is far from reaching his peak and has not had enough playing time at Real Madrid.