currently in the market for a decent set of in ear headphones for my ipod touch 2nd gen. My budget is $50 dont want to spend anything more for headphones. I listen to mostly rap and r&b's. I just wanted something that sounds good and want decent sounding bass. what do you guys recommend? also headphone/mic combo is a plus. I am looking at jbuds j2, j3, j3m and sennheiser cx300, cx400, and cx500? recommend any of these?