Whatever you wind up buying, just remember that when you "buy into" a system, you're likely to be with that system. http://www.bhphotovideo.com has perhaps the benchmark pricing for most equipment, and above all else, I've found them extremely reliable. I can't say the same for Adorama. I've been Nikon because of their optics since I started out 40 years ago, and I'm a happy camper, but hardly what you might call a "professional." Do your research, and be your own best teacher.