I here 'ya on the Delam..Kinda like rolling the dice..I also can't think of a slide out on aluminum skin..
The older ones like Lance would work maybe..Mine will sleep 6 actually..Two in the upper bunk/two on the dinette and two above the dinette if there small in weight..I guess a guy could beef that up pretty easy if need be..
Doesn't have the floor space of a slide but has a ton more storage than most slides..With a slide you lose the bed option above the dinette on most models and the storage above the bed if you don't use it for sleeping..It's all a trade off in what each person wants the most..
Floor space seems to be the most important around here and where the slide wins..Not important to me within reason as my time in the TC is out doing stuff and on the rainy days/TV and movies are there if you want..