Lookup a Nash 26z or 26z2. Well made, well insulated, triple bunk, large slide. They are no longer made any more and you can only find them on the used market.
I found a few when I was purchasing my trailer and really wanted to buy one, but the weights were a little heavier than what I wanted. If I had the chance to do it again I would probably have bought the Z or Z2 just to have the slide.
The Z or the Z2 (or maybe both?) are on Northwood's "wide body" platform, so they are actually 8' 6" wide vs 8' wide. My 27E is on the wide body platform as well... the 6" actually makes a difference on the inside.
I think Arctic Fox made an equivalent 26z/26z2 as well, but those are even rarer and more expensive.