Nice to see someone else come to the same conslusion as me, I've just signed up to import a 4 door too... plenty of good manual ones in Japan, you'll have your pick. Easy to get one landed/complied for under $15k.
Insurance will be just as bad, especially if you're planning mods.. have been struggling to find the right cover for mine (and I work in insurance!).
..and if you really cared about fuel consumption, you wouldn't be buying one!