we have owned a KZ STONE RIDGE 38fl for about a year and a half. we've been out about 75 nights and put about 10k miles on it. this is our 4th fifth wheel in the last 8 years. The other 3 were CARDINALS. We LOVE our front living unit. It, and almost all of the other front living units are probably the roomiest units on the market today. The STONE RIDGE is, in my opinion, the most "wide open" of all the fl units. And I have looked at every other fl on the market today that I'm aware of. Also, Ken, the recliner is positioned so you look straight at a 46" flatscreen! Also, ZERO problems since we've owned the unit. We pull with a 2012 chevy 2500hd duramax/allison, and it has done a wonderful job with no scary incidents. The Stone Ridge is well balanced and pulls easily. I highly recommend it.
You forgot the tongue weight! 13.5 k less at least 2k tongue weight leaves 11.5 k for 4 tires. Granted that there is very little reserve for safety, but if you don't overload with STUFF you will be within weight limits on tires.
We have had our stone ridge 38fl for 9 months. Spent 50 plus nights, pulled over 5 k miles. We love it! It's our third 5th wheel and for our purposes it's perfect. Pulling it with 2012 Chevy silver ado 2500hd and it does a fine job. Pulls strong, stops well, always in control. We bought the stone ridge because of it's wide open floorplan and because it was the lightest front living model we found. Almost nothing we would change. We ordered it with the 7000 pound axles and Goodyear g rated tires and 5th airborne pin box. Pulls better than the two previous 5ers we owned. The front living plans simply give a more residential feel to them.