I have the Saunders 670XL (condenser) and 670 VCCE (variable contrast) enlargers and recommend them. I have done 32x40" prints projected onto the floor and it works great. Just need a way to reach the focus knob. I used a piece of cord wrapped around the focus knob and held on with a piece of tape. Then hold the two ends in your hands to focus. Also the focusing scope called Magna Sight is great in this situation because you don't need to put your eye 1" away from it like the other scopes.

Jon