I didn't really do anything, but thanks for the kind words, Trey.
A ribbon tweeter will generally not disperse as well due to the shape, especially vertically. However, my ST RT's disperse very well horizontally, and since I don't listen to them standing up the vertical dispersion is kind of moot. When sitting and listening, I hear no dispersion issues.
Here's my advice: you heard the HT2's, no? Did you hear any dispersion issues when you were listening? If not, then forget what you read and trust your ears. Speaking of which, you said you didn't hear much difference between the domes and ribbons, so maybe that's a sign. I wouldn't pay for a difference I could not hear, know what I mean? If you can directly compare the domes and ribbons, focusing on the tweeter, go ahead. Otherwise just go with what you know you heard bro.