Ol' yeller summed it up well.
We have a 23 ft that is a 2000 on an E450 chassis.
It fits us perfect.
We just spent 3 weeks in it in May in Louisiana.
Due to heat and humidity aggravating health issues we did spend
a lot of time in it.
We had NO problem.
As they say your millage will very.
Realistically look at why you are buying it.
If you are not planing to use it full time there are a lot of
advantages to the shorter units. We do not want a longer one.
Ours pulls the Honda CRV on an Acme Dolley like it is not there
with the V10 in an E450.
Also when you look at units the E350 series are narrower than the E450
series. To us this was more of a difference than the length.
We did change the dining booth to a table and 2 computer chairs.
Why?
It fit what we wanted to do better and gave more floor area to move about.
We would have done that regardless of length.
If you can, I would suggest renting a unit or two before deciding.
See how floor plans work for you and how each handles.
Hope you find the one that works for you.