My first look is that for that size vessel there is not very good "hang out space". Where are you going to spend an the evening with say 4 people? The day to day living area, to me would be important specifically since you are looking for a liveaboard.
I'm a little bias but take a look at a few Krogens, ie; the main cabins.
2005 Kadey Krogen North Sea Power Boat For Sale - www.yachtworld.com