Hi

I own the G-1000. There is no any unwanted noise from it's outputs, even if I pump up all levels to maximum of 127. Level from line output then still stays below 0 db and perfect clean. I think this is fact of the architecture.

I tried MANY of arranger keyboards and I would highly recommend you some of Roland dolls (VA, G or EM series). I love their ear-friendly sound, output quality, reliability and great price, of course.

Good Luck