We have a 26' Cedar Creek and we LOVE it! It is nice and roomy with the slide out but you can still walk thru with the slide in. Something you have to watch out for as not all units are useable with the slide(s) in.
We previously had a 19' and got really tired of the couch being the bed.
Then we had a 26' Splash by National RV without a slide and tripped over each other toooooooo much. It was actually a 24' box. But we learned that this was a great size for getting a space anywhere. We often scored a spot due to being small.
Look really hard at quality issues! A gelcoat fiberglass exterior is far easier to care for than corrugated metal. A sealed underbelly helps keep your holding tanks warmer as does tank heaters.
The Cedar Creek is a whole lot bigger (taller and 2' longer box and slideout) but tows easier and we get better mileage than we did with the smaller, lighter trailer.
Our unit is no longer made (just 5th wheels and cottage units) but we were lucky to find a bank repo that looked like it had been barely used for a GREAT price :-)