really depends on the purpose. For high end competitions, PWM is probably best. I have never thought of Paderewski and all that authoritative (they are definately at the top of flimsly, i honestly believe printing them on lettuce would yield a more robust and longer lasting score).
If for personal playing and such, you would be best suited to just buy what you can learn and read easier, then cross reference w/ other editions if you feel something is a miss or you want different insight.
btw, the trashing of Schirmer blindly does dis service to some. Yes there are some awful editions (ie Bach, Mozart, ) but there are some jiggy editors worth seeking out, ie Joseffy for Chopin is pretty legit.
if i were compiling works of Fred I would seek these out as an option ( i have some of the Joseffy, and it's pretty great). As an alternative you can buy an urtext and also a good edition on the side and write in those editorial markings and fingers, etc you like and choose to include in your interpretation.
