Thanks, Fran. I don't actually have a BK-3, just considering it. Like I said, i mainly like the drum and bass accompaniment only, so there's a lot of what arrangers feature that I don't use. Arrangers are also way more expensive than I can generally afford, so the BK-3 might fit my needs nicely.
I'm currently playing a Yamaha YPG-235, which has very limited styles that I'm pretty tired of.