[ottertail]

I want to start off saying that i am not the most knowledgeable about sound. I do like quality stuff that will last me a few years and can tell the difference between good and bad sound. I am looking for some new earbuds, as my 3 year old skullcandy ones just broke. My 3 main frontrunners are: soundmagic e30, soundmagic e10, and sennhieser cx 300b MK II. As you can probably tell, i am looking to spend less than $50. I listen to country music, and am often in noisy environments, so these 3 all have some noise-blocking features. Please give me your suggestions and compare these earbuds for me. Dub it down a lot though, as i know very little about headphones. Also, feel free to suggest any others i might want to try.
Thank you all for your help.

Edit: i will be using an ipod, if that helps at all

 

[zamorin]

Have a look at  these very informative comparison threads:
 
http://www.inearmatters.net/2009/01/list_01.html
 
http://www.head-fi.org/t/478568/multi-iem-review-302-iems-compared-1964ears-v6-stage-added-11-12-13-p-806

 
btw, the proper term is IEMs. Earbuds are those that doesn't go inside the ear canal.