I've heard the Axioms and the Ascends, and I bought the Epos ELS-3s. I agree with Plinko that the Axioms were bright, but I found the Ascends to be just a little too laid back. The Epos (also a metal tweeter) were just right to my ears. I have a tube preamp, so that makes a difference too, compared to all SS gear.
Are any of them "better than speakers costing three times as much"? You can always find a much more expensive speaker that doesn't sound as good as what you have, so I think those kinds of comparisons are meaningless. At ~$300/pair, all of them are a good value, and I think the Epos is a great value. If you spend more money, you can get a better speaker. Decide on your budget, listen to some speakers, and enjoy the music!
David