The best replacement for 17-55 is 24-70.

The best alternatives to 17-55 are rated as following:
★★★★★  24-70
★★★★★  24-105
★★★★  15-85
★★★★  17-40
★★★  18-55
★★  16-35
★★  18-35
★★  17-85
★★  24-70 nikon
★★  16-85
★  18-135
★  24-70 canon
★  17-50
★  18-135 stm
★  18-200
★  10-22
★  24-105 canon
★  17-35
★  tamron 17-50
  18-105
  15-85 canon
  16-85 nikon
  sigma 17-50
  nikon 17-55
  50 1.4
  16-35 nikon

Your alternative for 17-55 is not listed? Suggest!
Speaking about 17-55, one probably shouldn't forget about 7d.

Other search terms related to 17-55 and their ratings are:
★★★★★ 7d
You have in mind a companion for 17-55 and it is not yet here? Propose!



Google Trends

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17-55
24-70
24-105