We had the Sunseeker 2500 with the folding Queen mattress. Loved the rig if I could have driven the class C in more comfort. (I'm too tall) IMHO Hated, Hated, Hated the folded mattress!
When we pulled into a rest stop or anywhere for a quick nights sleep, we had to put the slide out and build the bed. If you just wanted to lay down for awhile (not optional) you would have to install the mattress topper (which you will need) and make the bed every time it was used. When we bought the FR3 30ds with the king bed (Which was Great) we kept saying how nice it was to have a fully operational bed.
We, like you tried to justify that 5 feet. Now we see it is all about the layout and being comfortable with convenience.
2016.5 FR3 30DS AKA "Serenity"
Searching for that perfect spot with loving Wife & 2 mini dachshunds
Days Camped 2015 56
Days Camped 2016 121 and counting