MIL has offered to buy the kids bunk beds for Christmas as they want to share a room. We want one with a normal bunk bed on the top and a sofa bed on the bottom which folds out to make a bed. If there is a desk option too that is a bonus but no essential. We want a decent one and there is pretty healthy budget. Any ideas and no one suggest Argos as they have let us down which is why still no bed. TIA.