Frank, there are several good ones in the Factory styles but numerous R&R and Blues styles from previous models that work great. I do a lot of that, and it is particularly well suited for it.
I have even found a lot of styles for specific songs, with breaks built in, such as Jailhouse Rock, Blue Suede Shoes, Proud Mary, Dock of the Bay, etc. Some need a little tweaking but not much and it's easily done.
The AJamSonic package has tons of great styles included, plus a collection of MP3s that is very complete.
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DonM