I currently have some m50s (white box) and was wondering which one of these would be a better upgrade. I do enjoy bass but not enough to buy beats or Sony xb700. I listen to house, hiphop, rock and some jazz. I use my iPhone 4 with a fiio L3 to a E5.

Hello guys, I know I've only got 3 posts but I've been a long time lurker here.   My music ranges from Jazz, House and Hip Hop. I do like some bass. The thing that concerns me about the custom 3's is that they are almost 7 years old but should that even matter?   My main source will be...