I can totally understand why people say that it only costs $200, and to be honest, when i played with my PSR-E403 afterwards i had no clue how big the difference was.

I think that i was overwhelmed because of the price and some sounds, but the PSR-E series are 100 bucks more but are much better sounding and playing, something about rose coloured glasses.

Sure, if it's either a CT-X700 or a PSR-E263 or 363, go for this. But if it's either a CT-X700 or a PSR-E463? Go for the PSR.

Same with CT-X5000 vs PSR-S670, go for the PSR.