Welcome to the forum! We're in a similar situation.
We started with a Keystone Passport 199ML in 2010/2011. (19'ft TT -Had a shorter than Short Queen bed...I remember....I'm 6'4")
Upgraded to a Keystone Cougar 29REV in 2012.(29' TT. Short Queen Bed. Very Nice but we thought bigger would be better - especially when the grand kids are still "kids".
Now upgrading to a 3791RD - pick it up Friday, Apr 10. 41' 6" with opposing sofas that convert to beds and a King Bed.
We're thinking/hoping this may be our RV for at least the next 10 years......
I guess the key is to stay away from RV shows.