Yes, since dealers have to buy their demos, they'll buy 70 SE and say that 80 SE is even better. I might've simplified it a little, but it's hard to buy what you can't audition even when the models are close enough to each other. Anyway, $3500 is a significant amount except for the very few. Owners of the equipment will also have a bias, just a different one. And each entire system is often unique. I also like to watch interviews with chief designers of the brands on youtube, it might give me an insight of what they are up to.