I The Beats have an undeserved reputation. I completely disregarded them before I tried them. Many head-fi'ers and people who immediately disregard the Beats because of the Dr Dre and Monster emblem likely haven't tried them either. The biggest reason why I am returning them is that they leak sound. Not much, but because I plan on using these in my office, I can't have that. If I had a choice between the Beats and the Shures, I'd keep the Beats. Their mids are a little congested, but the bass quality, built-in amplification, and pure comfort makes them actually quite ideal for my purpose. Build quality kind of sucks but that's another story.
Again, I had my eyes on my M50s but just reading how people comment they're not the most comfortable, and some people just outright hate them, turned me off.
The DT770M's are meant for drummers. It's a very different sound from the regular DT770 but they reduce outside noise by something like a whopping 35db. I'll be putting mine up on the market soon...
As for Ultrasones, this is what I went for. I figure why not go for the best, so I picked up the Ed 8 Palladium LOL.
Having said that, someone at our last local head-fi meet brought a pair of the lower end Ultrasones. I can't remember the model. Maybe 650s? I don't know. He said retail on them was about $400 or $500. But... They were the worst headphones at the meet by far. They were built like crap (completely plastic) and sounded exactly like they were built. It was very eye opening (especially for the poor guy who bought them).