I'm getting my first nice pair of headphones, and I want to make a great choice, which is hard in this community because so many people have so many different opinions and I can't afford to try out oodles of headphones myself. If possible, I just want to get it right the first time. Anyway, as the title says, I don't want to spend more than $500. I will use them for gaming (primarily FPS and action-oriented games) but I actually will use them more for music. I listen to about 90% hip-hop/rap/r&b and 10% electronic/other. So basically, I want some headphones with bass, but not too much to make gaming an unbearable process. Preferably closed back as I live with people. Here's another important detail: I'd like it if they could be used without an amp. I know some higher end headphones (such as the Ultrasone Pro 550 and 750) don't even need an amp, and I would prefer these headphones didn't as I'd be listening to a lot of music on the go with my iPhone. I mean yes, a lot of listening would take place on my desktop with a dedicated sound card, but so would a lot of it be on the go. I know this is a lot to ask, but you guys are the authority on audio knowledge, so I'm sure you'll have lots of helpful suggestions.
A big thanks in advance.