That would be hard for us to answer. You'd almost have to perform your own testing to see what site receives better for you (and that carries the MCD traffic). Schiller Park is in sort of a hodge-podge of sites (NWCD, Cook, Dupage, etc). So what site would work best for you would be difficult for us to say.
What I might suggest is create the different sites in your G5 (each individually). Then create new button positions, each using one of the different sites and listening to MCD. Then switch between them when receiving the MCD traffic. Watch the signal bars and see what site is better for you.