For modern players using an for emulation (like RPCS3 for PS3 or Xenia for Xbox 360), the choice depends on your refresh rate needs:
ACfA is significantly faster than Armored Core 6 and earlier entries. Armored Core for Answer [PAL][NTSC-U][ISO]
Turn this ON to automatically discard empty weapons, which lightens your mech and increases speed. For modern players using an for emulation (like