If you’re looking for the best possible video output, you’re going to want to modify your console for RGB.
Nintendo 64
There are two possible modifications for the Nintendo 64 to enable RGB output. Depending on the revision you have, there’s a simpler adapter board that takes minutes to install and is relatively cheap. However, later models require the Tim Worthington board. This takes longer to install and requires more skill. Amiga of Rochester can help with installing either option.