The ONLY thing that really matters is what's coming out of the speakers--all of the other features are just glitz! The weight, number of keys, color, key feel, display intensity, etc.. are meaningless if the keyboard doesn't sound great in every category. The sound is followed by the OS, which of course is of paramount importance for both pro and home players.

How it actually sounds, of course, is very subjective, and every player has his or her own preferences. Some want loud, sharp drums, while others prefer them to be more balanced with the other sound components. Some want more realistic sounds and larger, actual samples, while others are content with what the manufacturer supplies. This component alone has likely triggered more heated discussions on the forum than any other. It's a mine sounds/is better than yours syndrome that will NEVER END.

When it comes to operating systems, some folks want an OS that reads the player's mind and does everything on its own without player intervention. A select few are willing to sit down, read the manual, then take the time to learn the OS from top to bottom. This is one of the few aspects pertaining to arranger keyboards where Diki and I are in agreement. I know a huge number of individuals that have never taken their keyboard's operating/user manual out of the zip-loc bag it was shipped in.

Cheers,

Gary