This is the cable I used:
http://cgi.ebay.com/Sega-Genesis-2-I...#ht_2577wt_930
And this is the converter that I used:
http://cgi.ebay.com/SCART-RGB-YUV-Co...#ht_1396wt_930
With that converter, if you are in the US you will have to use a 12V AC Adapter with a positive tip, I just used my universal Recoton adapter.
And then for the component cables, I am using gold Monster Cables.
I'm not sure how that converter is compared to other ones on the market but the picture is amazing to say the least. I honestly don't think it could get any better.