I have had some extended listening with the 4.1's (good friend) and the 6.1's (I own a pair) and would not come close to classifying them as bright, and I am VERY sensitive to bright speakers. They have taken a significant amount of time to break in, but right now, both have a very good amount of "air" and naturalness at the high end, though I would not call the high end as extended as the best ribbon or titanium dome drivers. The image depth is not particularly deep, and the 6.1's seem to have a almost imperceptable touch of lower midrange, upper bass "fuzziness", but I have not been able to totally characterize it as yet. Perhaps the issue with the 2.1's is a difference between models "voicing", "vintage"/ crossover change w/respect to older models or amplification. I have listened to both the 6.1's and 4.1's with subs. I think that the 4.1's and the 6.1's are very competitive in their price range. I have CERTAINLY heard much worse at the price point. I have heard that there will be reviews coming out soon in some of the rags, you could wait to see those. I will post a more detailed review of the 6.1's after full breakin.
