Modern Sleeper Sofa Modern Sofa Bed Or Futon Between $400-$600?

Modern sofa bed or futon between $400-$600? - modern sleeper sofa

I am looking for a bed modern / modern sofa / futon in my office to use as a bed. I want online, as the area around, but could use some opinions of customers satisfied or angry comfort. I do not want a college lookinf futon, but more like a sofa is a modern "scene-bar" lounge that folds into a bed.