First I apologize, if you are feeling upset or offended, but I dont get it, what shall be bad on BSNES and maybe I am wrong and dont know it better. At least I didnt had any problems playing through Super Mario World and there where no hiccups that I was aware of, same goes for Axelay or Starfox.
What is wrong, when I say, you can play BSNES fullscreen? Press F11 and you have it.
Doesnt matter... Gods of MAME have spoken... I know.