I agree with Fin, Feather, & Fur. It's a larger "outdoor" store with a pretty large firearms selection. It's only 5 minutes or so off the toll road as you get close to Cleveland.
Not sure how far east you're heading, but there is one in Warren (just north of Youngstown) that I've REALLY enjoyed when I can get over there! It's called Stocker's and it's about 10-15 minutes off the toll road. They specialize in everything shooting related and have an amazing selection of gear, reloading, accessories, etc, in addition to a good gun selection (including used).
Another one with TONS of used guns (crammed into a converted house in Cuyahoga Falls) is Dick's Gun Room. I enjoy that place a lot, too. It's about 15 minutes off 80.
Like jhop said, Dundee is about 30-45 minutes off 80, depending greatly upon traffic. If you go there, check out Jerky Outlet. BEST JERKY I'VE EVER HAD. There are many places to buy jerky at this exit, but none are as good as Jerky Outlet.