I'd emailed David on 8/23. He responded on the 28th and asked me about my room placement, which I sent him the same day. He then completely disappeared. I emailed him again on 9/2 and let him know I am still interested in his speakers, and just a minute ago I received a response. He didn't really say a lot, and said the tweeters you mentioned have been discontinued for two years, and you were "misinformed" about the sound quality. It feels to me like he thinks I am an annoyance. I'll be honest... not feeling impressed at all right now with his responses or (potential) customer service.
Edit: He did recommend the LX (from the models I mentioned), but didn't say why. I did try to leave it open to other models as well, but he didn't recommend any of them. I just got the willies from the conversation. I think I'm going with the Arendals.