Originally Posted by BruceHankins

Buy used and don't get a department store bike. What kind of mtb is it? If its a nicer mtb consider getting 26x1 3/8 or 26x1 1/5 road tires+tubes for it and trying that if you're concerned about drop bars and road bike geometry. Tires can make a noticeable difference in ride quality on some bikes, plus its a cheap and easy. If it doesn't work still you're not out much money. If your mtb is a Walmart branded tank though it might not be much help.