Here is a review from a real world 12 month experience with a Sonata Hybrid. Around town - 40 mpg; long trip on interstate - 35 mpg. Reliability? It has performed flawlessly with only trips back to dealer for oil service and tire rotation. You do need to understand this hybrid system operates a little differently than the mainstream models. It will not run on battery until it goes below a certain charge but rather by the time you are at 23 mph the gas engine will take over or run in tandem with the electric motor. Coasting down hills will go to battery power and certain times during systained interstate driving you will see the EV (electric vehicle) mode. The two motors synchronize so that you rarely notice without looking at the overkill dash board funtions. The dealer could not tell me what some of the displays meant.
I purchased at Rick Case Hyundai in Ft. Lauderdale and got a 20 year, 200,000 mile warranty. It is a good advertising gimmick as few would ever keep it that long. You may want to consider a road trip to purchase your next car! Opt for the Limited model - better sound system, all of the bluetooth array. I love the Bluelink for your smart phone.
The lifetime warranty on the hybrid battery was a compelling factor to me for choosing the Hyundai as two Prius long term owners in my office have had to face the replacement delima of a new battery or trading. Expensive battery.
I am reading some very good things about the new Honda Accord Hybrid that will give you 50 mpg. I do not know the price point on this vehicle, however. Michael may know that better.
VW Passat TDi - wonderful driving and handling vehicle. Your wife will thank you after each and every trip. And the diesel engine will fill your high mileage needs. Just know that there has been about a 3-4% failure rate on the high pressue fuel pump (HPFP). When it fails, the impellers pulverize and contaminate the entire fuel system, up to and including the fuel tank. VW has been very slow to admit, or step up and offer assistance on the $8,000 repair but rather say it was bad fuel. This does not help their PR at all. For 2014, engineers did lower the fuel pump pressure which seems to have helped. I have heard of no 2014 model failures. You would think a redesigned fuel pump would have been the real fix.
Would I take the chance on a VW TDi? Without hesitation. There are so many stories of people getting 50 mpg on trips with the 38-40 mpg being the city average.