The best replacement for droid eris is droid.

The best alternatives to droid eris are rated as following:
★★★★★  droid
★★★  motorola droid
★★  droid incredible
★  lg ally
★  droid motorola
  blackberry storm 2
  blackberry storm
  droid a855
  storm 2
  palm pre plus
  samsung rogue

Your alternative for droid eris is not listed? Suggest!
Speaking about droid eris, one probably shouldn't forget about android 2.0.

Other search terms related to droid eris and their ratings are:

★★★★★ android 2.0
You have in mind a companion for droid eris and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of droid eris in all years. Click on graph for more.
droid eris
motorola droid