I like the SNES version of Gradius III, might be nostalgia there but to this very day I still enjoy it, I can understand why some people wouldn't like it for the fact of slowdown, but really, I've played FAR worse shmups with horrible framerate and messy slowdown.. As for Gradius II, hard to say, I've enjoyed every version I played: the Famicom one even wowed me, it really pushed the console's hardware in some areas, the PCE version is great, but the arcade version? Well.. Comparing console to arcade usually gets this answer and for good reason: the arcade version is the best.