We will be passing through TN on our way back from a trip to FL and need a place to stay for one night to break up the trip. TN is roughly the halfway point, and we will be taking I-75. If we want to walk around and explore and find shopping, attractions, etc., which would be a better choice, downtown Knoxville, or downtown Chattanooga? I have heard good things about Chattanooga's downtown, but we have never really been in downtown Knoxville either. We would prefer one of these as opposed to just stopping at some exit along I-75 and getting a room, since interstate exits all seem like "Anywhere, U.S.A." and we would like to soak up some local culture and also choose a three star or better hotel which are not normally available along the highway. We will be there the last day of February, so if Chattanooga is ever so slightly warmer or less snowy, that would help too.