2 berth or 4 berth caravan?

[PandoraRocks]

I'm upgrading from a teensy 2 berth and want either a 2 berth with more space or a 4 berth.

Quite like a 2 berth with end washroom and long sofas. If you have a 2 berth, do use always make the bed up or just use the 2 sofas as singles? DP is 6'2" tall.
If you have a 4 berth, do you leave the bed made up and just use the dinette seats? I've found that 4 berths have shorter sofas at the front so can't be used as single beds.
I hate the palaver of doing/undoing the bed in my current caravan (though it is old, 1990s). I also want a reasonable light caravan and will be buying second hand.
Please give me the benefit of your experience.

Sorry I currently have a six berth (for 4 of us) as I like space, but when DC outgrow caravanning I'd definitely go for a 4 berth - one fixed bed (or alternative sleeping area) and a seating area that we don't have to assemble every night.