Congrats to you, I have an 2011 321 RLTS, the best thing is the 2nd a/c. It make all the world of a difference. Knock on wood, no problems so far. The only thing I did was added and manual awning on the slide out, ( not talking about the toppers) , now with the awning out I have the whole right side under shade. It ran around $1300, but it was worth it.
2011 Jayco Eagle 321RLTS FW
2012 Dodge 3500
US Govt survey shows three out of four people make up 75% of the total population