I may be able to offer a little information. We just purchased a new 36 Outlaw, and one of the reasons is for the cuddy room.
I can tell you that I have a lot more room than a friends 38 Fountain.
The wife and I overnight a lot and it was important to us to get both styling and amenities. We have TV/VCR, Electric Stove, Refrig, Microwave, Sink, enclosed vacu-flush head, two small closets, storage under the seats and the birth.
My wife is 5'4" tall and she can fully stand when she enters the cuddy and arounf the galley area. The head room decreases as you move forward, but I cannot tell you exactly how much. I am 6'1" tall and I am very comfortable in the cuddy. I do have to bend over a little but it is not bad. The head area requires a sit down job because of head room. The lounges are very comfortable, I can stearch out on them, we can seat a total of six adults easy, abd the birth has a lot of room. It has to be close to 7 to 7 1/2 feet long with plenty of head room so that you don't feel closed in.
The one item that takes up the most room is the A/C unit. It uses all the first compartment under the birth and you loose a little space under the lounges where they have run the duct work.
I hope this helps a little. Let me know if I can answer any other questions.
Check out this link which shows some pictures of the cuddy.