I have to agree with Dennis and Abacus regarding build quality. I can't imagine anyone thinking Yamaha's arranger build quality exceeds Korg's although Chony is an exception I'm sure. I've also never had a broken button, switch, key, or any other part on any Korg keyboard I've owned. I doubt my experience with Korg is an exception.
I've owned many Korg's and many Yamaha's and with the exception of my vintage CS60 and 9000 Pro which were tanks, I think Yamaha's general build quality isn't equal to other manufacturers (except the Motif and Clavinova line which seem reasonably well built). Yamaha's arrangers are of particularly cheap build quality in my opinion especially when compared to the build quality of my Wersi. The only keyboard I saw come close in build quality to Wersi was the Korg Oasys which I also owned but subsequently sold due to lack of software updates.
I realize many people on this forum couldn't care less about a manufacturer using cheap plastic and lackluster parts but I prefer quality and will gladly pay more for that. If I wanted a toy keyboard I'd shop at Toys R Us.
[This message has been edited by Ensnareyou (edited 08-05-2008).]