From what I see my plan is to be a Tamron man for years to come, with any luck. The AF 17-50 as I have said is awesome, and as far as the 70-300 you can't beat the price for what you get. like sparkie said I don't know if the lens is working up to specs or not but I like it. Look forward to hearing about the 200-500mm and some sample shots. I am torn between waiting for the 70-200 2.8, or getting the "big gun" now to play with, advice and suggestions always welcome!