Just like at one time I wasn't supposed to trust anybody over 30...I wouldn't trust anyone who says any one anchor is better for any area or better than any other anchor.
The West Marine Advisor on anchoring pretty well covers it, no one answer for anything.
That said, the new generation of anchors (Manson Supreme and the not-in-China inferior metal Rocnas) have shown their worth compared to old style anchors, although the Danforth-types are proven to be good in one directional holding requirements and certain bottoms, but rarely in reversing currents.
Buy an anchor sized for your boat and anticipated wind conditions. You can use this link to size your anchoring SYSTEM, ;cuz it's a combination of anchor, connectors and rode that makes up the system. Going up one size on only one component makes little sense. Too many people, for instance, will use larger rode and find it's too big for their cleats and meaningless in the strength department.
http://c34.org/bbs/index.php/topic,4990.msg30400.html#msg30400
How I sized my system (manual on a 34 foot boat) is discussed in that link, too.