The best replacement for psx is epsxe.

The best alternatives to psx are rated as following:
★★★★★  epsxe
★★★★★  ps1
★★  n64
★★  saturn
★★  psone
★  snes
★  n64 graphics
  3do

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

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



Google Trends

Scale is based on the average worldwide traffic of psx in all years. Click on graph for more.
psx
epsxe
ps1