I'll be the first to admit that I have been tweaking my headphone plug in the jack just to get both L & R coming out for two years now. Sometimes I have to REALLY tweak it. Some days I have to throw it in the back of my car (where I've done some of my best work! On the 15 freeway...) Anyhow, the midi jack is shaky as well. BUT I can't imagine composing without this jewel. Yes chords are a pain. I will more often now grab an operator board when I can. But I'm a working stiff with a day job, so I've gotten quite proficient with the keypad, whizzing in step notes measures at a time, offsetting attacks and velocities, throwing in incidentals and grace notes...almost sounds REAL! Truthfully, I'm a better PMA-ist than a pianist! I'm not familiar with the QY-70 at all, I would assume from what you say that you can enter whole chords on the little buttons? As my touch screen wears and the jacks slip into oblivion, I'll have to consider repairs vs. new-used PMA (Will they go up in value now??) vs the QY....
by the way,(unrelated) has anyone seen the new Ensoniq FIZMO keyboard?? I lapsed into a trance twisting the knobs on that thing at Guitar center...heading to an Ensoniq BB to see what's up...