Maybe with better demos, or, as you say, actually playing one through a good set of speakers or headphones will change people's minds.
This point Ian raised got me thinking. What are we all using for monitoring the audio from You Tube videos? Do you have a good set of speakers or headphones attached?
I have several systems available, inlcuding my KA20 speakers which I use for listening to my keyboards and organ etc. However, having played and recorded a few videos now, don't think the sonic audio quality is nearly as good once the sound has been compressed and uploaded to You Tube. Even HD recordings don't sound the same as either the live play, or playing back the video directly on your own computer (uncompressed)
It may seem an obvious thing to say, but many of us seem to be basing our complete opinion of a product on a few You Tube videos.
I keep saying it, go to your dealers and try the kit out. You will never get a better chance to hear what it is actually like to play with doing so.