YES! If I had to sell all but one bike I would for sure keep my Surly Ice Cream Truck and I'd be happy. As it is, I ride it year-round and will even commute on it in the summer when I might hit some single track on the way home. I will say that some pro-fat bikers like to claim that the big tires can be a substitute for suspension, I wouldn't go that far. The tires soak up some rocks and roots, but they're not suspension. The big benefit of the fatties in the summer time is the traction and forgiveness in picking lines.
The Surly Wednesday is a more budget-friendly option, and there are obviously others.