It really depends. How many people are in the unit most of the time? How many will potentially be with you. We have a 199ML with just a sofa....no dinette. Doesn't work for us. We have nowhere to sit and face one another on rainy days, nowhere to prep lunches while making breakfast, etc.
Our duaghter joined us for a weekend and basically had to sit in a corner out of the way because there wasn't room for 3 to stand and/or move around.
We're going for a larger unit now. We are jumping to the other extreme....so we won't be trading up again after the next RV show in February of 2013.
We opted to err on the side of more space and function.
OVERRIDING FACTOR: What can you tow SAFELY. Doesn't matter what we want in a TT....if we can't or shouldn't tow it....well....we all know the next part.
__________________
Chris and Patty
2015 Keystone Montana 3791RD Legacy Edition, MorRyde 4000, Dual pane windows, Goodyear G rated tires.
2013 GMC Sierra 3500HD, Duramax, SLE, SRW, Crew, Hensley Trailer Saver hitch, Blue Ox BedSaver.