The SP6 by Kurzweil looks tempting. Thanks to Casio, everybody is making a light weight 88 hammer key at an affordable price. I remember the K250 by Kurzweil in the 80s was priced at $20,000. I had a Kurzweil K1000 in the late 80s. It had the best piano sound and other realistic orchestra sounds.

Kurzweil SP6
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"You Shall Know the Truth, and the Truth will set you free." John 8:32