The best replacement for 9x is 9xr.

The best alternatives to 9x are rated as following:
★★★★★  9xr
★★★★★  dx6i
★★★  fs-th9x
★★  futaba
★★  dx8
★  asraam
★  chimsedinang
★  tieu thuy ngu
★  csdn
★  spektrum dx8
★  r-73
★  orangerx
★  flysky
  turnigy 9xr
  dx9
  futaba 6ex

Your alternative for 9x is not listed? Suggest!
Speaking about 9x, one probably shouldn't forget about fms.

Other search terms related to 9x and their ratings are:
★★★★★ fms
★★★★ realflight
★★★ v911
★★ ezuhf
★ dragon link
★ phoenix rc
You have in mind a companion for 9x and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 9x in all years. Click on graph for more.
9x
9xr
dx6i