Aremkay,
Excellent question. Wouldn't mind if others responded to that. Mike says the KN2600 organ voices are thin!! Not sure how that compares with the PSR2100. The PSR2100 organ voices are not touch sensitive and there is no expression pedal?
If you compare the organ voices on these models, let us know your opinion (got to do that myself)
Donny,
Is it really a personal choice? Everyone that has tried Native Instruments B4 raves about it, with no dissenting voices. So there are personal preferences for organ voices from keyboard msfgs, but it's unanimous for organ softsynths!!!
Starkeeper