Not the original poster, but when it comes to Beyerdynamis the DT 1990 would be an easy choice unless you are treble sensitive. They take EQ really well so you can adjust bass to taste. They slam better than my LCD2C, though to be fair the bass reproduction is different between planars and dynamics. I love the LCD2C's bass for different reasons, it's a much more atmospheric, all encompassing reproduction bass wise, but the DT1990 will just give you that juicy oomph.

Some people can find them tiring though. I personally don't have a problem listening to them for 8+ hours, but it did take me a week to get used to the sound. Didn't like them too much the first few days.

And the build quality is of course very good. They feel very sturdy and look quite pretty as well.