That Droid naming thing is a bit of a pain. I meant the Moto Droid. The Eris has average reception.
We're west of the Mississippi and so AT&T does have better coverage. Verizon generally does better than anyone else on the east coast, while AT&T does nicely in the west. Can you invite your iPhone-owning friend over to visit so you can see how the reception is? The iPhone isn't known for its strong reception, but you might have better coverage with AT&T or another carrier in your area. The best way to find out is to test it out and ask your friends who use other carriers.
-------------------- Lisa Gade Editor in Chief, MobileTechReview