You have a spot on your sensor or focusing screen. Other then that i feel there is a lot of dead space not adding anything to the shot, particularly on the bottom and right side. Maybe a slight crop (but still keep the rule of thirds in mind)
Had the same problem myself. Went out on bought a Optex Digi-blower (any blower should work) fixed the problem. If the spots are there you will need a sensor cleaning.
I actually had spots similar to that just from having dust on the lense, so I would clean that first. If that doesn't work that its probably on the sensor... Good shot though