That is impossible. Standard definition has never looked incredible.
And I use a $3500 video scaler(VP50pro) and a $1000 noise reduction box(Algolith HDMI flea) It gets the SD picture looking as good as you can get and I would never describe an SD picture as incredible. I've also been watching and recording HD since Summer 2001 so I'm used to watching HD content.
Well there's your problem... Get rid of all that expensive junk and it will look incredible. Incredibly awful maybe, but incredible nonetheless.