Don’t take me too seriously, cause I’m new around here and fairly new to dSLRs, but…. I’ve got the xTi and I’m using a Tamron 17-50 f/2.8 lens primarily. I definitely like it and I especially like the fact that it’s pretty fast. Don’t limit yourself to the OEM lenses, necessarily. Canon makes great ones, no doubt, but some of the aftermarket manufacturers are pretty good, too.