If you guys don't mind, I'd like to repeat myself with two choices that I want to stress even more.
artcellrox wrote...
Hitogatana
Yakuza Girl
The former needs an excellent studio helming it, to make sure the fights are just as spectacular animated, and the latter needs a proper adaptation that an anime may be able to give. The manga was too short, barely explained enough, and ended in a serious WTF and abrupt way.