To the OP, threads like this are pretty useless. Even at the $20K level, every speaker, and I mean every speaker, has an advocate. At the $50K level we're talking hero worship. Subtle differences that mean something to one person, like realistic imaging, mean little to another, and the only way to figure out what you want is to listen for yourself.
You're probably going to need to travel, and I highly recommend it. I did, with 1/5th the budget you're discussing, and it made all the difference. If you believe Gene about that RBH, go to the factory (or Gene's house!) and listen. What's a $1.5K trip when you're dropping $50K+ on something that will only be worth about half that the minute you take possession? For the Legacy Helix, I'd expect a demo by Dudleston himself at the factory. In this price class you think differently than asking for advice in a forum thread.