Hi there,
The Beyerdynamic DT770s are my favorite closed cans for gaming/movies. Incredible sound stage/positional accuracy for any headphone, especially a closed one! And omg are they comfortable, I can wear them all day! Amazon has them for under $200 usually, I recommend the 80 Ohm version.
My favorite open headphone is the DT990 pro or premium versions. Also incredible comfort, I got my 600 Ohm DT990s on sale for 250 at Amazon.
The 990s sound better for an all around headphone. Incredible music and gaming/movie performance for a great price.
I use both of these headphones with a Fiio E9 amp, Sells new for just under $100 on Amazon. Great value also.
I've tried just about every headphone in their price range and also up to $500. The Beyers are my favorite in terms of sound quality, comfort and value.
I hope this helps, please feel free to ask any questions!
Good luck!