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.

Really depends on what you consider to be an "upgrade".

When I made the jump from DT770 to LCD-2C I was a bit disappointed. My expectations were that of a linear upgrade in the same way you would get with upgrading a graphics card - I was expecting to literally hear more sounds in my music, which was not really the case. It was more like I was able to focus better on the subtle sounds that I already knew were there, but there wasn't too much brand new information I could substract from the track.

From that point of view and at that time it didn't really feel worth it. But at the same time that's a somewhat limiting way of looking at it.

Now take that same LCD-2C, EQ it a bit to add a few more db in the mid to sub bass region as well as a bit of treble, and then pair with a record such as Infrared Horizon by Artificial Brain. That EQ combined with the 2Cs relatively intimate yet at the same time thunderous soundstage, its bass extension characterized more by a sense of audible vibration rather than slam, alongside that subtle "plucked" sound specific to plannars, and you get yourself an experience that is so different from the DT770 that may as well arguably worth x4 times the price depending on your preferences. It's not downright better in the same way that upgrading from 60 to 120 hz is better or from LED to OLED is better, but it's such a different way of experiencing your music that it can be worth it, very much so or somewhat so depending on your personal preferences.

Would you say that the MG can be EQ'd to sound similar to the OG? There's somone selling the MG professional for the equivalent of $620 and I am not sure if I should pull the trigger. I prefer a brigther sound.