I really like the concept of the 2 White Hawk Murphy bed models. We considered them, but finally decided on the 24RKS because of the much greater storage. We go on 2 week trips twice a year and need the extra storage. The 20MRB is certainly a lot more roomy than our first RV, a Starcraft pop-up. That was also our step up from tenting and backpacking. I'm sure you'll have a great time with the 20MRB.
2015 Chevy Silverado 2500HD LT 6.0L 4.10
2015 Jayco White Hawk 24RKS