Thanks again to everyone for their suggestions, I'm sorry to say I stop monitoring this thread after I decided on a bike shop in mid-Jan. And, the place I ultimately chose was . . . Spinning Wheels on Carleton St. They were very nice and seemed to have a pretty good selection of "comfort bikes" which is the exact fit for my dad (they also have a 2 year warranty under which they do maintenance and repairs for free). Best of all, they are just a few blocks from his place in Toronto. Needless to say he was very excited and is waiting for winter to tail off to take his new bike out.