Do yourself a favor. Try out a MH1C. Then go back to your CC51. You will understand. Here check out this read. http://www.head-fi.org/t/632892/review-sony-mh1-the-best-kept-secret#post_8800823 These blow the doors off of not only the CC51 but all budget fi earphones on headfi to date. These are comparable to earphones that cost in the triple digits. This thread is the deals thread am I not correct.? Well then there is no better deal than these. These must be heard to understand. Read that review. He is 100% correct.
Better yet read some of the impressions. Unless you think the CC51 can hang with the likes of a GR07 than they have no place to hang with the MH1C..
Thanks for the heads up on these. I just ordered a pair. :)