I am considering purchasing a new 2011 toyota prius assuming they will have some good end-of-year deals. I have a long commute to work each day and I also drive long distance (at least 300-400 miles) every couple of months. I am looking for a vehicle with a very smooth ride and very quiet interior at highway speeds, also with great fuel economy for $25K or below. Please tell me if prius is the best choice for this...