I just bought a rotisseries chicken from Longo's on Bloor, and I can genuniely say it's the best chicken I've had from a supermarket. The meat was tender but firm, and the chicken wasn't oversalted like most.
I'm quite impressed by the prepared foods at Longo's. It seems healthy and fresh. They also have specials where you can get a main like salmon steak plus 2 sides for $6 to $8.