I have the couch on the slide, on a 2700, the viewing angle is neither good nor bad for the space available. Changing position to prevent a "crik" in the neck becomes second nature quickly. I bought my unit used so had no choices, but we make it work. There are probably better options. Can't comment on an onboard air bed, but the one we have at home is pain in the patoot and according to the wife is going to be replaced.
Get well soon.
L.G.