Tectonic 9 (3u) or Calibar 900C are the only rackets in the current lineup that I can think of which are in the same league as the N90-III in terms of power. The Tectonic 9 (3u) should be somewhere between the ZF2 and N90-III regarding stiffness and headheavyness/headweight. (haven't used the N90-III for quite a while now so my memories might be somewhat off...) The Calibar 900 is also up there but has a different frame type which doesn't provide as good of a feedback as the other 3 rackets and tends to feel rather hollow. But then again, the Tectonic Frame will feel different too but not that much. As always trying them out would be the best. The AXForce 90 Max sounds like the best option for you so far. It shares some of the ZF2 characteristics but its head isn't as compact and the shaft is (probably) not as stiff. So it should be more forgiving in theory. Can't comment on the power as nobody hasn't posted any detailed measurements (at least I haven't found any) which would give an indication on its headweight, actual weight, swing weight or real world balance. Victor will be launching the Ryuga 2 in the near future, might be worth looking into as well.