It seems anchors are religion, sort of like the eternal Chevy vs Ford discussions....
Previously, I was considering a Rocna anchor, but they are also pricey:
http://www.rocna.com/
They have a version that's designed to be retrieved easily if it gets caught in rocks:
http://www.rocna.com/product-range/rocna-fisherman
They also get good reviews and test results. But I haven't seen a 'mud only' test like the one in my previous link.
If you think any anchor is expensive, check out the Stainless Steel prices of any particular anchor!!