Definitely the Ta 152H-1, if you get used to her she'll compete as any other Fighter you enjoy flying. She is maneuverable just for my likings, tight turn-fights in low altitude are no prob too. I don't fly over 7000m as I can't hold on with AI there.
Low, Mid alt only for me, there she is a good deal.
J2M5 I flew on a few occasions, but as for Japanese armament they are a bit weak for my taste if you're used to the LW stuff. Last time was before gun-options in UP3 got changed, can't tell how it felt with the new lay-out. Flying her was comfortable, good turn rates.