The best replacement for 900 is 950 platinum.

The best alternatives to 900 are rated as following:
★★★★★  950 platinum
★★★★★  920
★★★★  1080
★★★  800
★★  1000 rzr
★★  1100
★  sd 800
★  2000
★  djm 2000
★  920 lumia
★  gma 950
★  820
★  c50
★  850
★  commander
★  titan 2
★  jcm 800
★  2.4
★  902
★  rzr 1000
★  sb 800
★  htc one x
★  harmony one
  1000
  800 lumia
  f7
  v star 950
  gsm 1800
  nutribullet
  901
  p180
  n9
  600
  950
  1800 gsm
  sb 600
  vstar 1100
  1800
  768
  jcm 2000
  585
  samsung galaxy s ii
  1200
  mx 950
  800 rzr
  sb 700
  shadow 750
  lumia 800
  lumia 920
  honda 750
  510
  htc titan ii
  harley 883
  john deere rsx 850i

Your alternative for 900 is not listed? Suggest!
Speaking about 900, one probably shouldn't forget about traktor.

Other search terms related to 900 and their ratings are:
★★★★★ traktor
★ rf extender
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