I played all these inexpensive keyboards and evaluate their usefulness to use in live performance situations. All has serious shortcomings that makes them unusable for live players. Some only has one but unfortunately it's a fatal shortcoming.
DGX-202
-Sound quality after amplification: decent and usable
-Sound quality out of built-in speaker: weak but usable
-Ability to change individually main, dual and split voice: YES
-Registration memory which allows saving voices, style and transpose into one button: NO. This is serious shortcoming for live player.
-Styles: usable
-Ease to change voices and styles: DIFFICULT, too many buttons to press
-Keyboard feel: light synth feel, just ok
-Size and weight: 30 lbs and fits in car trunk.
DGX-300 and DGX-500
-Sound quality after amplification: decent and usable
-Sound quality out of built-in speaker: weak but usable
-Ability to change individually main, dual and split voice: NO. This is a serious problem, folks.
-Registration memory which allows saving voices, style and transpose into one button: YES but a bit awkward to access.
-Styles: usable
-Ease to change voices and styles: DIFFICULT, too many buttons to press
-Keyboard feel: VERY GOOD feel
-Size and weight: 30 lbs and barely fits in large car trunk. Forget DGX-500 to fit in a car.
PSR-292
-Sound quality after amplification: decent and usable
-Sound quality out of built-in speaker: weak but usable
-Ability to change individually main, dual and split voice: YES
-Registration memory which allows saving voices, style and transpose into one button: NO. This is a serious problem for live performance players.
-Styles: usable
-Ease to change voices and styles: DIFFICULT, too many buttons to press
-Keyboard feel: light synth feel, just ok
-Size and weight: 16 lbs and fits in car trunk.
That's all folks. Lets see if anyone else have any comments.