The best replacement for htc one is galaxy s4.

The best alternatives to htc one are rated as following:
★★★★★  galaxy s4
★★★★  iphone 5s
★★★  htc one max
★★★  nexus 5
★★★  samsung galaxy s4
★★★  lg g2
★★★  galaxy s5
★★  moto x
★★  galaxy s3
★★  htc one x
★★  htc one mini
★★  note 3
★★  iphone 5
★★  droid maxx
★★  s4
★  htc one m8
★  iphone
★  samsung s4
★  iphone 4s
★  samsung galaxy s3
★  galaxy note 3
★  galaxy 4
★  galaxy 3
★  s5
  droid ultra
  note 2
  samsung galaxy s5
  g2
  8x
  dna
  samsung galaxy 4
  htc m8
  samsung galaxy
  htc one m7
  xperia z
  samsung s 4
  htc desire
  google nexus 5
  iphone 5c
  lg optimus g
  samsung s3
  galaxy s4 poll
  samsung iii
  wait for iphone 6
  htc amaze
  amaze

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Speaking about htc one, one probably shouldn't forget about beats headphones.

Other search terms related to htc one and their ratings are:
★★★★★ beats headphones
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htc one
galaxy s4
iphone 5s