lol, a dvd player is a dvd player. it will only ever produce sd quality video. dvd players only play mpeg2 sd video. upconverting is nothing but conversion from dvd resolution to hd resolution, a resizing conversion that does nothing magical, it cannot create quality from nothing. dvd has 6 times less resolution than hd after all. the only assumption that makes upconvert dvd players possibly a good thing is that their converter maybe better than your tvs. and perhaps its better to do it earlier in the process.
anyways if its an h264 bluray iso rip that fits on a dvd its 720p at best. web rips are bitrate starved to force fit for piracy. won't play on a dvd player in any case.