I think you had better go out and have a listen to an S910, and even a T3 if you can find (or afford) one. The guitar parts are STREETS ahead of the old 3k. There are new transpose tables that address what I said about guitar voicings changing depending on key, and some much better amp simulators and rock guitar parts...

That's a what, six or seven year old design you got there, isn't it? Things move pretty quick in music technology...

For its' day, the 3k was state of the (MOTL) art. But you REALLY need to listen to how things have got better. It isn't just the styles. It's the sounds they use, and the OS that plays them...

Ask anyone here. Ask them if they think the guitar parts are better on an S910 than a 3k...
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An arranger is just a tool. What matters is what you build with it..!