I have a Digital Rebel XT and am looking for a good all-in-one lens (because it's what I can afford). All I have right now is the lens that came with the body (18-55). I want the lens to do a lot. I need it for weddings, portraits, but also be able to do some close up things. I need help! I have a budget of about $450 and was told at a photography shop the Tamron Zoom Super Wide Angle 18-200mm f/3.5-6.3 XR Di-II LD Aspherical (IF) Macro Lens is a good one for an all-in-one. I read some reviews saying that lens has trouble with AF. Any suggestions?? I would love to hear them! Thanks!