I would try Fuji 160c or 160s in place of Reala. The colour palette of the Kodak films are different, the speed of MF lenses are generally slower so you'd probably want a faster film whilst keeping similar colour and contrast. The grain of Reala is great, but if you are shooting 120 you probably don't need to worry about it. If a 200 speed consumer film was made in 120 by Fuji, that would be the way to go...