Let's just put a lot of questions to rest..... If you don't want to play PRIMARILY hiphop, rap, techno and urban music, STOP READING!
This is NOT a PSR. There are no ballroom styles, no 50's and 60's styles, no trad latin.
Look elsewhere unless you WANT to sound current, hip and urban. Buy one for your kids, they will love it, you will hate it (unless you buy them headphones too!).....
There, that saved you a bunch of time, didn't it....?!
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An arranger is just a tool. What matters is what you build with it..!