Just to get this topic back on point....

Live Sound is only ONE of many criteria to measure the value of a keyboard to a performer. You have to weigh all the other attributes of the board such as realism of sounds, style support, ease of use, ergonomics, hardware support, reliability, extensibility, playability, expansion capability, etc. This is essential, especially for this price range of $3,000 - $4,000.00 investment.

If you are going to commit to a keyboard, don't you want to ensure it will satisfy the "BULK" of your attributes for a long time so you can recoup your investment? Having a keyboard that is not supported or having a very small public domain support network is a big negative to one of those key attributes. Some of those attributes can be tweaked, enhanced, etc. to add greater range of acceptability.

Take the "Live" vs "CD" issue. You can adjust a keyboard's presence by +/-20% by adjusting EQ, changing instruments, compression, etc. That can overcome any shortcomings.

What about voices, will a keyboard allow you to adjust the quality or realism of voices +20% to adjust for poor realism by adding 3rd party samples, adjusting voice parameters like ADSR, resonance, DNC, Mega, etc?

The point I'm trying to make is; you have to measure the board as a whole; from the viability of the Manufacturer to the support network, to the live sound and then balance that with your pocketbook and your needs as a musician. This is how you should be purchasing a keyboard.