If your needs aren't quite as demanding, the Sony a6400 and Fujifilm X-T30 offer much of the functonality of the a6600 and X-T3 for less money, and both have earned our Editors' Choice recommendation.
Real-Time Tracking focus system; Big battery; Improved handgrip; Integrated EVF; Stabilized image sensor; Dust and splash protection; 4K recording
Single, slower UHS-I card slot; No focus joystick or front dial; Drops in-camera flash