The best replacement for 23 is 24 inch monitor.

The best alternatives to 23 are rated as following:
★★★★★  24 inch monitor
★★★★  24 monitor
★★★★  27
★★★  glock 19
★★★  39
★★★  glock 27
★★★  25 tires
★★★  24
★★  27 inch monitor
★★  27 monitor
★★  46 chromosomes
★  25
★  glock 22
★  springfield xd
★  22
★  23.6
★  25 road bike tires
★  sig p229
★  21.5 monitor
  yf 22
  19
  m&p .40
  27 inch
  prevnar 13
  sig sauer p229
  24 in monitor
  35 fuji
  21.5
  23c
  glock 32
  700 x 25
  glock 30s
  part 25
  xd 40
  mx 25
  s&w m&p 40
  glock 30
  far 25
  glock 17
  glock 35
  36

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Speaking about 23, one probably shouldn't forget about wrinkles.

Other search terms related to 23 and their ratings are:
★★★★★ wrinkles
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23
24 inch monitor
24 monitor