At this point.. none of them are.
That is the right answer.
Cross Referencing Data is the reason why all anon solutions fails.
Your IP address is not anon,
Your Browser info is not anon,
Your Email Address is not anon,
Your Bank Account which you linked is not anon,
Your address where you mailed or received goods is not anon,
there are no guarantees the person that did business with you did not sell your identifiable information.
All anon solutions will fail til they can solve all of the above.
1. i2p
2. secure browser
3. i2p email address
4. use cash and use the i2p exchange or btc-e
5. a real pickle, i don't think any coin can solve this
Hmm I too think thats not something a coin itself can or should solve. I believe there will be a way to deliver stuff without you having to give your address, or that of someone else. The basic technology that could make that happen already exist... but I think it is many years away from actually being a practical thing... so I wouldn't hold my breath.