Saddle angle is a huge factor, so first start by adjusting the nose up/down on your existing and see if that helps. You'll need to experiment with it on a new saddle too.

Two big bike shops near me have 30 day exchanges on saddles, which can help you make the right purchase assuming you have a LBS doing the same/similar. The bad news is, you'll probably pay MSRP which looks bad compared to ebay, and big internet discounters.

The good news is, as long as you ride enough over 30 days to know for sure that the saddle is good for you. No matter how good of a deal you get online, you'll come out ahead paying MSRP for only one saddle rather than having a box full of saddles you didn't like.