Oh, the 288 mid-cabin I drove with the 500hp ran 74mph on GPS turning 5150rpm with 5 of us on board. I'm 6'3" also so I liked the room up front and the view from the drivers seat...but you are right the cabin is tight. For me the extra room to haul company is more important than a place to sleep.
I agree with articfriends - there are a lot of other 25-30 single engine boats out there to consider.
how about a Scarab 29'
or a Warlock 29'
or an Eliminator 28'
or a Nordic 28'
just go to boattrader and search with your price range, your length range and pick "type: power" and "category: high performance" and you'll see alot of options.