Wasn't there a topic on this like a week ago?
I use the CX300s and they sound good to me. Nice bass and detail, everything's there. Apparently they rival the E2Cs too.
And to whoever was dissatisfied with the 465s, try a pair of 212s if you're on a budget as they sound great for the price. If you have money to burn, get the HD595s as they are the best Senns you can get without requiring an amp. I own both the 212s and 595s and can recommend both.