Wondering if the Beyerdynamic DT770's are any good. Right now I have the Astro a50's but I'm not happy. I'd be looking to sell them. Are the Beyerdynamic DT770's any good and would they be an upgrade? Yes I do game, however that is not my main priority and watching videos and listening to music is. Also, are there any headphones that are better than it at the same price? What is a nice amp I could get for it?