I think you will find that the Head is the one place where you will struggle to find 6 Foot (plus) headroom.......

Odds on you won't find it in the forecabin either. A Renown has good headroom in the Saloon, me is 5'11 and I don't recall any problems - but maybe depends on how much over 6 foot you are talking about......from what I read very tall folk do struggle on this with many / most boats.......also make sure you can fit the bunks!

Personally I would defo want full standing headroom (wearing shoes) over the Galley and most (if not all) the Saloon. In the Head I would swap height for elbow room (within reason).