I can send it back if I decide I don't want it, but we'll talk if it comes to that Gary.
As far as sound, the Korg sounds great. Yamaha has great guitar sounds, but it's easy to load great guitar sounds into the Korg too. In fact the acoustic guitars on board are really good. The overdriven and distorted rock guitars are good. Where Yamaha wins so big is in the classic electrics from the 50's, 60's, and that is mostly because they have set up the DSPs so well.
I've never needed a style for Korg that I haven't found, or for any other arranger in the past 10 years for that matter. There are hundreds of thousands of styles out there for Yamaha, but the vast majority or renamed, slightly edited, or versions from previous models. It would take weeks to go through them all, edit and save the ones you might possibly want.
How many styles can you use?