The best replacement for q2 is 2ct.

The best alternatives to q2 are rated as following:
★★★★★  2ct
★★★  q3
★★★  jawbone era
★★★  2q
★★  pilot power 2ct
★★  jawbone icon
★★  q3 blueant
★★  era
★★  power pure
★★  s20
★★  pilot power
★★  quaife
★★  jawbone
★  bt016
★  q2 platinum
★  pilot power 3
★  pilot pure
★  q4
★  supercorsa
★  q3 zoom
★  rosso corsa
  sportsmart
  michelin pilot power 2ct
  q1
  roadsmart
  pirelli supercorsa
  bt003
  michelin 2ct
  bridgestone bt016
  m5
  icon
  q1 blueant

Your alternative for q2 is not listed? Suggest!
Speaking about q2, one probably shouldn't forget about g9.

Other search terms related to q2 and their ratings are:
★★★★★ g9
You have in mind a companion for q2 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of q2 in all years. Click on graph for more.
q2
2ct
q3