Welcome to the Jayco Forums, I remember you from either iRV2 or Forest River Forums, can't recall which. The Precept does not have air brakes. We use the RVI2 (older version) but the mechanics are exacly the same. I love it and its easy to put in and take out and customer service from them is amazing.
For tow bars, I currently have a Blue Ox Aventa, which works fine, but I was looking at the
Demco Dominator. I like the fact that the bars support themselves, and the cable management is something I also like about it.
eTrailer makes one just like it for alot less, just not as shiny.