The best replacement for simcity 4 is cities xl.

The best alternatives to simcity 4 are rated as following:
★★★★★  cities xl
★★★★★  simcity 3000
★★★★  simcity societies
★★★  simcity
★★  simcity 4 deluxe
★★  cities xl 2011
★★  3000
★  simcity 2013
★  societies
★  simcity 5
★  simcity 2000
★  city life
★  cities xl platinum
  sim city societies
  cities xl 2012
  simcity deluxe
  simcity 4000

Your alternative for simcity 4 is not listed? Suggest!
Speaking about simcity 4, one probably shouldn't forget about rush hour.

Other search terms related to simcity 4 and their ratings are:
★★★★★ rush hour
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simcity 4
cities xl
simcity 3000