Not the specs, but may be useful. http://www.gameboats.com.au/boatSpecs/print/c28fc.pdf
I have had 2 28's in Sydney. I am 5 11. I can stand in "salon", but it does not have alot of head room. Did not sleep on it much, but 3 6 footers would have someone sleeping on the floor (one in the front cabin, one using the convertibe dining area, and one on the floor.
3 can sit on the flybridge, but 2 better.
Big back deck which is the main attraction. We had 2 steel poles made to fit in the rod holders on the transom corners and ran a cover from the back of the flybridge to the poles. Shade for the back deck. may not be an issue in your area.
Main (dry) storage area in the front cabin and cupboards in the salon.
Great sea boat. Wet (as it is low to the water), but always got us home in some very ordinary weather.
Had diesels and petrols. Yanmar diesels the go.