Are there NO Roland dealers in your area? As cheap as the GW-8L is, somebody is likely to carry it...

You might also post some questions to GW8-L users at Roland-arranger.com. We are starting to get a small community of GW-8 users there, got an active Bug forum (few small issues, most of which are down to 'why isn't it a Yamaha? ), and some of them might be in a position to comment about the authenticity of the styles. I'm afraid I'm old school Latin, myself, so I can't really comment on whether the modern styles are accurate or not...