They are not the bottleneck and everything else in your system may be upgraded since the system keeps sounding better and better.
My take on it is that the recordings, speakers, and listening room are the bottlenecks at this point.
I care about the performances, so I am stuck in terms of recordings. Some are good and some are not so good.
I have to compromise with my listening room because I share it with others and it has to still be multi-purpose. I've improved it, but I could do better if I had a dedicated listening room. (Unlimited funds would be nice too.)
I feel that the GedLee speakers are about as good as you're going to get at this point in time, but speakers still have a way to go yet before they reach perfection.
Most of the electronics I've seen is already good enough, and further increases in measured or theoretical performance are not audible.
I also figure that Earl is able to afford more or less whatever electronics he wants (he could probably even arrange a trade if he wanted). In addition, he's trying to sell speakers, so wouldn't he choose the best electronics to show them off?