I love them. As far as an all rounder for all purposes and genres, I like the MA900 the most up until the MD and Annie price range.
The imaging and soundstage are a thing to hear for yourself. The vocal presence is natural and organic sounding, though admittedly not on the level of the 650 and Annies, though that's to be expected considering they cost half or less.
And you are right... They are really good. I am once again reminded why open headphones sound better than the closed headphones... Because they are open!
Anyway I am really liking the sound so far. Very balanced, no severe highs roll-off perceived. Great open sound for a reasonable price.
That said, the W1000X are still great in terms of what closed headphones can do but... yeah, the MA900 at 150 USD sound about the same as the W1000X at 500 USD to my ears, which is kinda sad :/
Now I just need to order the Fidelio X1.. I just have to :P
Meanwhile I'll be thoroughly enjoying the MA900 at home and W1000X on the go....
The one thing I need to get used to is my ears touching the drivers on the MA900s. It is a bit uncomfortable right now but I'll get used to it.
I ordered this cable for the X1 to replace the stock one - http://www.ebay.com/itm/310126281263?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
Seems OK, right?