I just got a Rebel T3 and I'm looking for a budget telephoto lens. I'm just in this as a hobby and don't need top quality. But I'd like to have the best quality I can afford. I understand that USM is a big advantage and the EF-70 has a bigger EF-S equivalent size. What I'd like to know is whether the EF-70 is better in that it will take better quality photos? I may commit to the more expensive lens just because I do some video events and I don't need motor noise turning up in my sound track even though I use a separate sound recorder. Mainly I just want better photos though and I'm willing to spend the extra money if the difference in photo quality is significant.