The best replacement for a100 is a18.

The best alternatives to a100 are rated as following:
★★★★★  a18
★★★★★  a90
★★★★★  super paint
★★★★★  a110
★★★★  a200
★★★★  b3
★★★★  a500
★★★  a200 skins
★★  a230
★★  a90 micromax
★★  superpaint
★★  d80
★★  xti
★  htc flyer
★  canon 400d
★  karbonn a21
★  canon xti
★  400d
★  7d
  5d
  sony a200
  a21
  pentax k100d
  m100
  rebel xti
  a105

Your alternative for a100 is not listed? Suggest!
Speaking about a100, one probably shouldn't forget about a90.

Other search terms related to a100 and their ratings are:
★★★★★ a90
You have in mind a companion for a100 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of a100 in all years. Click on graph for more.
a100
a18
a90