The best replacement for 28-135 is 18-135.

The best alternatives to 28-135 are rated as following:
★★★★★  18-135
★★★★  17-85
★★★★  24-105
★★★★  28-105
★★★★  18-200
★★★★  18-55
★★  24-105 canon
★★  24-105 l
★  24-85
★  55-250
★  18-200 canon
★  18-55 canon
  tamron 18-270
  canon 18-200
  18-135mm

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Speaking about 28-135, one probably shouldn't forget about t2i.

Other search terms related to 28-135 and their ratings are:
★★★★★ t2i
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28-135
18-135
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