Which is better for all types of music? How do they compare in sound quality and comfort? Isolation does not matter.

I need an amp for these. I mainly listen to music through my computer. My budget is at 130$ max. I have considered the Nuforce Icon Mobile, iBasso T4, PA2V2, and Cmoys.

I can get anything below 150$.

I need some headphones that cost 150$ or less. I mainly prefer closed, but I'm willing to try open. The headphones need to be able to play all types of music from death and black metal to classical and instrumental. They also need to be somewhat decent for gaming, movies, etc.. I've tried...

How do the A55s compare with other AT cans?