Your best option for picture quality (480p) is a softmodded Wii to disable region locking + NTSC games + Wii component cable
In order to benefit from this support, it is necessary to use either a GameCube console equipped with a digital A/V output port (model DOL-001), or a Wii console. In both cases, a component video cable and a supporting television is required.[1] However, support for component video was removed with the DOL-101 revision of the GameCube hardware in May, 2004.[2] As the official Nintendo GameCube Component Video Cable was discontinued at the same time, it is nowadays difficult to obtain. All Wii systems are capable of outputting 480p for compatible Wii and GameCube games.
Only games produced for NTSC regions will directly support this mode. Although PAL editions of the DOL-001 hardware were produced, the games themselves only support PAL (576i) or PAL60 (480i). As such, those featured in this list all refer to the NTSC region versions released in either the United States or Japan. Provided that all other pre-requisites are satisfied, some NTSC titles may be used on PAL hardware in 480p mode but, due to region locking, this requires the use of either a software loader (such as the Datel Freeloader) or a modchip.
http://en.wikipedia.org/wiki/List_of_Ni ... :9_supportA launch NTSC Gamecube + Gamecube component cable would be even better (the Gamecube uses a better quality output chip compared to the Wii) but is impractical because official Gamecube component cables go for over £100 on eBay.