Once and for all:
HERO: if you are keen on buying a Roland AMP, then there is not much sense in buying a processor. This would happen, if you want t0 play at home. Your Roland amps would give rudimentary effects and some distortion too.
If you have plans of playing live in gigs, you WILL require a processor. Say Boss or Digitech.
In that case, you don't need to buy a Roland AMP. You can plug your processor to cheap amp like STanger or Kustom, or plug it into your PC speakers.
While playing live, you can plug the processotr directly to PA system/
Now don't go into the whys and hows. This is how it goes.
You donít get what you deserve, you get what you negotiate.