Whats the best ace combat

Ace Combat 5: The Unsung War
Hand down the best Ace Combat. I've played every Ace Combat game since Air Combat. Five is by far the best. It has an amazing story, a myriad of plane choices, and you actually get attached to your squad mates.

ACZ is equally good. AC5 has more planes, but ACZ allows to rearm on certain missions, and has multiple secondary weapon options (It also gives you the ADF-02 MORGAN which has a weak beam, an ecmp, and burst missiles (used by Scinfaxi and Hrimfaxi)).

It all depends on your fighting style, but AC04 is the worst between the three.