best auto for realtors jeep?????

I currently drive a  Ford Excursion V10 10-14 MPG.   I am thinking of buying a newer auto for work.  I need some suggestions. My first choice is a new or slightly used  Jeep wrangler 4-door.   Does anyone out there have one that they use in the real estate buisness.  If so how is the interior room, MPG and comfort. I usally drive between 650 - 1000 miles per week.   Also I need 4WD because of the area I work in. I am on construction sites very often.  Please give some of you suggestions and MPG with the autos you drive or suggest.  Look forward to youe sugestions. Have a Great Day