The least one could say that in APS-C land Canon users have all the choices.
I own several lenses in and I am positively impressed.
the kit 18-55 STM is already decent
17-55 f2.8 is IMHO an amazing lens, till now I can't find a combo that beats 7D plus 17-55 in the medium range.
15-85 seems a very decent performer on paper at least, testing it tomorrow
18-135: have used this lens and was very pleased with the results.
and now I have three lenses: 18-55, 17-55 and 15-85 and it's hard to let one go....