Umm, i have the rha ma750's. They are $120 and all I can say is that they sound amazing. I'll be honest, i'm not the biggest audiophile, but I do like hearing details and something other than bass. Coming from skullcandy, sol republic, etc. So the rha earbuds were real clear and crisp. Anyways, here's this cool list I found (and used) when I was looking for earbuds: http://theheadphonelist.com/headphone-list/ It's actually very helpful and the people over at headfi forums really know their music stuff.
the rha's are also very durable. I listen to music 24/7 no lie, and I'm a scrub so normal cheapo earbuds last no more than a few months, where as i've had the rha for a year to a year and a half. Still good and going strong.