I use an upright dolly and I've moved all kinds of extremely heavy gear with it. I'm not a big guy, but I managed to get my Kharma speakers (225 pounds per crate, each) from the garage into the living room and then unpacked w/o any problems. I even used this dolly to move some VERY large and heavy bookcases from one room to another to make space for a new couch, all by my lonesome. If you mess around buying and selling big gear for your system, a nice dolly is a requirement, it is not a luxury. I got a really sweet one for $50 at Home Depot....
