I have an old Fuji mountain bike and I'm considering upgrading to the Trek 8.3ds which is one of those hybrid/dual sport bikes. My rides average 20 miles, 90% paved bike trail and 10% hard pack gravel. The Fuji is not the correct size which is the main reason I'm considering the upgrade. I'm curious as to how others who own or have have experience with this style of bike feel about them. I have no ambitions to go off road so I don't need a full on mountain bike. Any thoughts or opinions will be greatly appreciated.