Flatfoot,
I guess they feel weighted compared to the WK series. I have not played her DGX in a while. There was more of a piano feel to them. BTW, the PSR2000 I owned I simply hated those cheapo keys. I actually like the Casio feel better!

maestroec,

The WK-3700 keys work fine for me. I had always used a Casio WK series for a 76 key controller for the past few years. I used it up to last year to control my PSR2000. Worked fine for me. That is an individual preference everyone has an opinion including me!

I always tweaked the sounds on the WK-3500 I find I do not on the WK-3700. They are pretty neat right out of the box.

Good luck with you choice. Everyone's tastes are different. Try before you buy!

Good Luck!

-Linda