I know I don't get to decide but I was trying to think about it in over all terms. This is what I came up with and then what my answers were.
-MA viable. The biggest beef I see with new birds we've had is if they aren't latewar uber, the cry is 'hanger queen". While I don't believe that's true of the 39 or 25 as many of us fly them, I would agree that the majority of AH drivers are much more interested in performance over history
With that being said, what I like to look at includes the following on top of MA viable:
-Length of service
-Areas of operations
-Scenario, Snapshot or FSO use
I ended up coming down to two birds that fit all those best at least in my eyes.
Bristol Beaufighter and Ki-43 Oscar. Both were in it from at least 40 on to 45. Beaufighter saw service in ETO, MTO, CBI and PTO. Oscar covers CBI and PTO and fills a huge hole in the Japanese planeset for any early war scenario etc.