The Casio WK1630 is the $299.00 Casio but a good choice would also be the Yamaha PSR350. It is $399.00 and includes a disk drive and XG sounds from Yamaha. The Generalmusic GK310 I had in my store for just a short time (until the two I bought were sold) and I didn't re-order any more. In my opinion, not up to the Yamaha PSR350 or Casio.
George Kaye
Kaye's Music Scene
Reseda, California
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)