I am decideig which headphones to buy, the headphones in the title, but I'm leaning towards the ATH M50S LE. I want headphones that have a good soundstage, don't require an amp, and have good sound quality. Also, the headphones should be able to be driven solely by an iPhone 5 with 128 bitrate music. They should be relatively portable, comfortable, durable, and sound good with rap, pop, and alternative music. Thanks for any help!