Uncle Dave (et al)... Pretty much all Roland arrangers have been backwards compatible with older styles, so if you have an old 5/4 style (plenty around) it ought to work SORT of OK out of the box. If you get one and don't find it in there, I'll send you the Take Five style, no problem. And older, simpler styles, same deal.

Thing is, Roland have a set of tools called Makeup Tools which is I think by FAR one of the easiest to use to revoice and tweak older styles to use newer sounds and kits effectively.

The Prelude and GW-8 had some pretty decent B3 sounds (by that price-point's standards), but, as usual, a lot of that is getting a volume/expression pedal and playing it right, but the effects have a decent, VK organ derived Leslie sim, etc., and I doubt the BK is any worse!