I'm going to be purchasing a dslr in the near future. I don't want a super expensive one but don't want to shoot myself in the foot either. I really don't know squat about lenses and need some help. I want to take pics from quite a ways away. I've been looking at the canon xti and the nikon d40. My uncle likes the sony alpha because it will except minolta lenses. Please help I'm getting confused.