HQ4x is better, but then again, all HQ filters eat a substantial amount of processing power and performance is dependant of the bandwidth between the CPU and the video card. So for some people using HQxx can be detrimental to the gameplay experience if they can't reach a stable 60/60 frames per second (or 50/50 for PAL). Triple Buffering usually works better than VSync (and Triple Buffering also enables VSync). Enabling Hi Res MODE7 disables filtering for all sprites that are used along with MODE7 effects (e.g. sprites on top of a background that uses MODE7 will not be filtered). Well, what works for you I guess.