Yak3, Spit16, La7, 190D, 109k, P47M, N1K ( due to 4 900 cannons, 550 dive, and infinite E climb with amazing turn ability, should be perked atleast 5-10 perks. Id leave the P51 just for posterities and the 50s which are tougher than ever these days with connections to bring planes down. This would balance out the fights a little better I think and maybe get some of the "vets" in tougher planes instead of chasing off the new comers.