The good news is there are many, many floorplans and brands to choose from.
The bad news is.....there are many floorplans and brands to choose from ! It can be overwhelming. Honest truth is, when I was shopping, I literally used to carry a notepad with me and made notes on different brands and layouts, because more than once, I found myself back in and looking at one that I had already seen and ruled out for whatever reason.
That said, I have been over the top happy with my funfinder 189FDS. Going into my third season with it, have towed it around 25,000 to 30,000 miles, spend 4 to 6 months each year in it, and still having a blast with the whole experience.
Best piece of advice I can give is when shopping, take the time to sit for five minutes or more in a trailer, and imagine being cooped up in there for multiple days because of inclement weather. Will the layout work for you under those circumstances ? You will probably sit in some and say to yourself....oh my....I'm feeling closed in already. That would not be good ! Other layouts will seem roomy and give a good feeling.