Whats the difference between them and the 700s? And how well do they drown outside noise? And are both of them pretty tight on the ears? Will they fall off easily if not put on perfect? Will something like running have them fall off? thanks

Right now I have Amazon.com: Sennheiser CX300-S Earbuds (Silver): Electronics and Amazon.com: Sony MDR-V300 Monitor Series Headphones with Folding Design: Electronics Is it safe to assume that the k701s are going to be better then both of them quality wise, even without the amp...

I mainly listen to rock, but I have pop and some hip hop that I like. So I'd like pretty good bass. I'm not planning on going out with it too often, but I'd like something that has the option to be used outside. I'm not planning on buying anything else other then the headphones. Features that...