Please show me your best shader+overlay for SNES and Genesis!

I been trying to set up a emulator+media box on my TV (1080p TV) and as such diving a bit into the world of shaders to create the authentic feel. I am wondering what are some of you guys’ favorite combos of shaders and overlays to create this sort of presentation? If you got screenshots, please post em so I can check it out and hopefully find something excellent for my family to see next time they are over.