Second's Out is one of my favorite albums. I am a huge Genesis fan and like both eras but at the end of the day I prefer the Collins versions of all the songs overall.
I am also a fan of Peter Gabriel and while Genesis would not be Genesis without him, I gravitate toward his solo artist material.
As for Supper's Ready I think the Second's Out version is the winner. I also am rather partial the the last two sections performed after the In The Cage medley on the Invisible Tour in 1986 here in the US.