Looking for some advice? I recently purchased the Ford Fusion, but after 4 months, it is getting poor mileage and I haven't had good experiences with the dealership. I've seen alot of good reviews about the 2011 Sonata and the price seems right (MSRP 21,800 at the dealership I'm looking at). Any insight or advice on any of the following: Ford Fusion Trade-In Value, Sonata Reviews, Negotiating Price Etc....?