If the source & the display are both set for the proper aspect ratios, they should never have to be changed and there should be no distortion at all. 4:3 material will (and should) have side-bars and anything wider than 16:9 will have bars of varying heights at the top & bottom. If you aren't seeing these bars with material that is not the same ratio as your screen, something is set wrong. Different displays will call these settings by different names... Wide, Normal, etc. If the OP isn't sure what settings to use, I suggest a set-up disc like Video Essentials, Avia or even the THX Optimizer found on most 20th Century Fox and LucasFilm titles. They can guide almost anyone through properly setting up his/her equipment. That said, I have never noticed anything improper in GT6.