Being 6''3.5" tall I am cursedly sizing the headroom in boats larger than my budget. Take it from someone who grew up in a house whose father designed the basement headroom to meet his height of 6'', you never get used to the constant crouching nor the forehead bashing. In the past four months I have been aboard literally scores of 27'' to 32'' boats and just one, a 1983 Catalina 30, has tolerable headroom specifically in the middle of the salon floor.
If it''s only a matter of momentary ducking from one comfortable space to a short term use area consider it exercize and and an improvement on your needed flexibility topside. By the way, I''d like to hear from other sailors if there are used boats, similar to the one mentioned above, with true 6''5 head room.