Just ordered my Canon Rebel XTi

… with the 28-135 IS lens.  I’m not sure that’s going to be the best lens for me, but it’s a good starter compared to the Sigma lens I was using on my Digital Rebel.  I’ve seen photos shot with that lens, but my biggest concern is the speed.  I wonder if I’ll be switching the IS on and off a lot.  We’ll see what happens.