If a pair of Mackie HR824's make your arranger sound MUCH better than your headphones, I'd go and spend some decent money on some GOOD headphones!
Yes, it ought to sound a BIT better in a room, but if the sound balance changes drastically, it means your headphones suck!
I'm kind of enjoying all this banter, but, I'm afraid to say, on the whole, I don't think I have EVER heard a user demo on this forum that couldn't fairly easily be duplicated by ANY of the TOTL arrangers, with the possible exception of the audio styles from Ketron. They are all powerful enough that, if you had the talent and the time, whatever you DO have ought to be able to sound virtually as good. Korg have some great pads. So does Roland, so does Yamaha. Roland have some great pianos. So does Ketron, so does Korg, so does Yamaha. There are certainly DEGREES of 'best' in each sound category, but nothing, AFAIK, dominates across the board.
Put me on a desert island with any TOTL arranger you choose, I guarantee I'll be happy enough to use it indefinitely
(Does that make ME an arranger 'god'?
)
There is such a small difference between them all, we end up basically arguing about angels dancing on the head of a pin. We each have our own preferences, and LOVE to talk about them, but honestly, if there's anyone here that can't get a good sound out of anything he sits down at, it's time to look more at yourself than the arranger...