You can still get the ones that open out onto the floor - ikea even has one (its quite small though) as well as Clark's rubber. I don't think they're too much chop for sitting on though, so if it needs to be used a lot as a sofa it might not be the best choice. There are lots of high-density foam options at Clark's that are quite comfy too, but you're getting away from having sitting-furniture.

I agree with the PP who said the beddinge is quite firm - we have a firm mattress normally so don't mind but others might prefer more softness. Another thing I do like is that it's long enough to lie down and snooze without opening the bed part which is handy as a nap zone.

OP have you decided what you'd like to get?