@Techno Kid Did you ever try other tips with the R-50? I really recommend that you try some triple flangers, either Ety or Shure's versions.
It gives the possibility for a much deeper insertion than the stock tips, although I will say the stock tips are pretty decent, but the possibility of the deeper insertion and a better seal that the triple's can provide you will or may hear as almost a whole step up in sound quality.
A friend of mine received his R-50 today after I recommended them to him last week and he has posted a review on Amazon http://www.amazon.com/Monitor-Balanced-Armature-Earphones-Earbuds/dp/B005XSBNG4/ref=sr_1_1?s=electronics&ie=UTF8&qid=1335219376&sr=1-1
Edited by Jupiterknight - 4/23/12 at 4:52pm