DJ,
I would not bother. First of all, the 100W is with 10% THD (total harmonic distortion), which is way too much. With 0.4% THD you only get 80 watts.
Also, I don't see if the mixer is stereo, which you really want for an arranger KB or for playing records/CDs.
You would be better off buying a good set of computer speakers for half the price, and a small mixer (e.g. Behringer) for another $90.
That's my $0.02 worth.
Alex
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Regards,
Alex