Prices for HP41 modules/peripherals

[Gene]

You can also of course, have an HP 41CL with every rom known to man and woman. :-)

As to roms themselves, I think Bob has it right.

Hepax, CCD and/or Zenrom and PPC (although there is much in this that has been surpassed) for non-HP modules. The Extended IL is also an important one.

HP? Advantage probably.