Pipistrel Virus or Sinus is my choice. Fast, very efficient, ideal for cross-country flying. In 2012 a Pipistrel Virus completed a long westbound flight around the world (from/to Slovenia via Senegal, Antarctica, Easter Island, New Zealand, Mt. Everest, Seychelles, etc.). Average fuel burn was 4.78 gph in 369 hours flown. The total distance was 49,138 nm, 17,873 of which were above water. The average ground speed was a little over 133 knots with an average headwind of 12 knots. The highest recorded GS was 190 knots and the highest recorded altitude was 29,413 feet near Mt. Everest. (sources:
Flying Magazine,
Full Itinerary,
GreenLight WorldFlight | North Pole - Why)