Great advice from the guys above. My first camper was a 1989 Airstream but I can't recommend them. They are EXPENSIVE and the maintenance is high. Scratch one of the aluminum panels and it'll never be the same again. The worst TT I ever owned was a Forest River Salem. Kept it for three years and it was falling apart when I traded it for a Denali 30RL. I had that one for 10 years with no significant problems and have just traded it for a 2016 Denali 326RL and I love it.
What ever you buy, I highly recommend that you look at rear living units because the best view from inside most RV's is the out the rear.
Good luck and keep us informed on your decision.