Thanks for all the replies. All I care about are the sounds of the voices and styles. Also ability to save settings(voice, style, transpose) into registration memory for easy recalls during performance. Voice harmonizer would be nice but not a must for me.

Taking into account the above, pls help to answer the following improtant questions:

Is Yamaha PSR740 better than PSR550 ?

Is Yamaha PSR740 better than PSR-1000 or vice versa ?

Thanks