That CASIO WK-1630 as I mentioned that even a pro was using it on stage. Uncle Dave also witnessed this on another thread few days ago. You can use it from beginner all the way to advanced - it will last a long, long time. You can even make money with it gigging. It's quite versatile and cheap ! I would say go either with that or the Yamaha DGX202 that George mentioned. Not sure about the EZ30 since I have not played it.