The best replacement for 6 is 6x.

The best alternatives to 6 are rated as following:
★★★★★  6x
★★  8
★★  cat 5
★★  8 hours of sleep
★★  12 point sockets
★★  8 bench grinder
★★  8 bean boots
★  9 cell battery
★  8 gb ram
★  omega 3
★  honda accord
★  hydroxycut
★  7 continents
★  7
★  12 string guitar
★  7 string guitar
★  v6
★  12 point socket
★  4 lifesteal
★  4 recessed lighting
  6
  rg 59
  series 7
  cat5
  ford fusion
  8 pack
  raid 10
  ios 7
  nero 7
  7 license
  java 7
  6 lol
  samsung galaxy s5
  cat 5e
  raid 5
  nylon 66
  ata 100
  12 volt
  toyota camry
  9.7
  rg59
  vmware
  mazda 3
  cat 6a
  5s
  nissan altima
  4 prong
  nex 7
  4 cylinder
  10 megapixels
  six
  5
  lipo 6 black
  muscle milk
  ie 7

Your alternative for 6 is not listed? Suggest!
Speaking about 6, one probably shouldn't forget about inositol.

Other search terms related to 6 and their ratings are:
★★★★★ inositol
★★★★★ trace
★★★★ redsn0w
★★★ iphone 4
★ addons
You have in mind a companion for 6 and it is not yet here? Propose!



Google Trends

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6
6x
8