For Philosopher's Stone, you might want to take a look at ADigitalMan's edit. He originally did Socerer's Stone by later released an extended Philosopher's Stone.
I don't know how many differences there are between that version and the ABC cut. I think one small scene was slightly out of place, but you wouldn't know it. I don't think ABC had anything additional, but I haven't done a 1:1 comparison. Maybe someone else has.