Sophia At this very moment, the e383 is on sale for $169 on Amazon, and Sweetwater, and Musician's Friend. So, it might be a perk from Yamaha. I've had a few pangs, and if I did buy it, I'd get it from Amazon, because of the free returns. SweetH2O and MF offer free returns on items that are either damaged or have a defect. Where Amazon will pay the return shipping if the buyer's expectations are not met, as long as that privilege in not abused. I'm just not sure if I want another instrument, or if it would help me to play any better.
Page 68 of the e373 manual shows all of "voices", which I think is what Yamaha is calling the sound banks.