Joseluis,
The Kn5000 is a much better keyboard than
the psr 740. The Kn5000 was technic's flagship keyboard before the Kn6000.
The sound system on the kn5000 is the same system on the kn6000 (66 watts) and sounds
tremendous. The sound system on the psr 740
is very weak and underpowred. There is no comparison. The Kn5000 has a terrific sequencer. You can input complex chord changes in step entry mode and perform extensive editing to your sequences. The 740 does not have a real sequencer. It records a song directly to the disk and there is no ability to edit the sequence. The construction feels flimsy and the key action is mushy compared to the kn5000. The user interface is terrible compared to the kn5000.
There is one keypad that you use to select
voices, styles and tempos. You must first press a button to put the keypad into the correct mode, then you enter a numeric value to select the style, voice or tempo. If you do not enter a numeric value, you must scroll thru hundreds of choices. This is very cumbersome when you are playing live. The kn5000 has dedicated controls to select styles, voices and tempos. It is much faster and intuitive. The 740 is a decent keyboard at $900 to a $1000. A kn5000 for $1,200 is a much better keyboard for a little more money.
Jim