Hi T5. May I ask why you are contemplating selling your Tyros 5 76? How good the Pa4x is out of the box, or any synth out of the box really, depends on how different your sound taste and expectations are from the original sound designers who thought their programming sounded great out of the box just before they released the keyboard to us. All the basic controls like EQ, relative program values and program and style selection are very conveniently accessible on the P4x if you would like to make modifications to the presets. So I think your question is difficult for someone else to answer. I may like the sounds and styles out of the box and someone else not. Or vice versa. It's really a matter of taste. The board is very playable OOTB but you may prefer a different adjustment here or there. The important thing IMO is that it is easy enough to tweak if you do want to, which it is. Best of luck. Hal