The thing I find with Korgs is there is a lot of tweaking of sounds, styles and volume levels to be done. It's a case of go away and do your homework rather than open and play out of the box. For the Pa1000 and Pa700 owners what eq settings are you using this can make a difference to the overall sound.
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Gem Wk4, Solton Ms60, Technics Kn5000, Korg Pa50sd, Yamaha Psr k1, Tyros 4, Korg Pa700