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(24-70) * 1.6 = (38-112), i.e., (40-110), and that's weird, unusual and basically messed up
(17-55) * 1.6 = (27-88). i.e., (28-90), and that's customary, reasonable and basically nice
There are reasons that lens designers settled for decades on zooms like 28-80, 24-70, etc. Some of it has to do with physics, but mostly it has to do with what people need somewhat balanced against cost/physics.
The EF-s 17-55/2.8 is a superb lens. You might also give a quick try to the Tamron 17-50/2.8, which is also a very nice lens, though not quite up to the EF-s, especially at MFD.