i am not a pro player but i get around numerous Gospel concerts and am asked tohelp produce and arrange for numerous choirs in the Birmingham and london area. I need an all in one unit simply because i do a lot of work "onsite" that is actually with the various choirs making adjustments to songs or arrangements there and then. A decent sequencer is essential on an arranger keyboard. I could do without the sampler if i absolutely had to but i use the one on my Psr 8000 quite extensively although it is rather basic. Maybe i am the exception to the rule but i would like that feature too.