You'll miss out on the best by relying on a store IMHO, unless you can travel to a lot of them to get a wider range of choices or just go with their usual few brands in any one place. Did you test the Submersive first? Do you doubt Seaton's quality? Try searching out some of the speaker/sub home gathering threads here and read some reactions from those who have had a chance to touch, smell, hear, and even carry, such speakers. Got me lusting if I were to spend that kind of money, those two would be top of my list. Personally not usually a big fan of horns either (like lower end Klipsch particularly).
"I realize that somebody playing free music isn't as commercial as a hamburger stand. But is it because you can eat a hamburger and hold it in your hand and you can't do that with music? Is it too free to control?" - Don Van Vliet (aka Captain Beefheart) discussing commercial success in the music biz