Thing is Diki, I like creating styles on the keyboard...easier to hear the results, and very convenient.
Re-voicing is a snap on the PSR, especially when you get used to it...just like anything else...the Roland "make up tools" would no doubt be handy, but not as important as style assembly.
I don't use any software on my PSR at all, with the exception of StyleAdjust, which lets me create cut time styles and styles with several time signatures.
Otherwise, I never use my computer...not for recording(other than to burn a CD) or style editing of any kind.
That's the way I like to work...not about to change now.
BTW...just bought a new custom built PC...24" screen...500 Gig HD running Windows 7...lovely piece of work, and a real joy after using laptops for the past 10 years or so.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.