I carefully listened to these AH-D600 headphones at my friends's quiet house (my friend owns them). I would have given the D600s a 3-star raing.

These headphones have lots of distortion and ringing to the point that they are unpleasant. For a better pair with good bass at similar price, ATH-M50 or AKG-K267 are much better.

Talking about Styling alone, these look very very ugly. Beats look a lot better.
Regarding fitting of head sizes: I have 2XL head and found it to be uncomfortable. My friend, who has a small size head, likes the fitting/comfort just fine.

Most of the distortion doesn't occur until lower frequencies where audibility of distortion is traditionally so low it's really not funny. As for ringing, maybe - I've never had a problem with "ringing" per-say on any decent headphone I owned. Maybe you're sensitive to something on it like some others? Many in the D600 note they are not fatiguing or unpleasant in the least, favor bass balance some, some say it impacts mids too much while others like me think it transitions gracefully, etc. Very polar cans with a range of thoughts all over.

Personally, while the M50 is okay I've found it less enjoyable then the M40FS which seemed better balanced. Haven't heard the K267 though, but looking at the sheet at innerfidelity I doubt they would be a "fun" phone for me either.

When I heard the D600's I had a very nostalgic feeling that reminded me of listening to a pair of B&W 802D in a really nice listening room.
As for the styling I enjoy the looks actually, and for the head size I'm also a 2XL and found them to be the most comfortable headphone for me yet.
Either way though, see the YMMV, caveat emptor at the bottom

"I'd only purchase this after having experience with real reference cans and knowing exactly what you're looking for and enjoy in a "fun" can."

-- I must ask why you're posting directly to me and not posting your own review though. Considering our past correspondences this strikes me as odd to say the least.

Of course headphones' mileage varies among different end users. That was the reason why I commented on your review. I personally had the exact oposite experience / feeling on most of the items that your mentioned -- I wrote down my comments so others can have a balanced view. Of course, you are entitled to your opinion, and so do I.

I would not review gears that I do not like.

If your music does not have fast-, hard-and low-hitting bass, you would like hear low frequency distortion. Or maybe you like the perceived "fun" bass amount enhanced by distortion. Same goes with ringing.

To users looking for fun bass and cool styling, IMHO VMODA M-100s are much better than D600s. But don't take my words, please try them yourself, compare and decide.