I found a few good links for anchor comparisons. Interesting results I must say.
http://billspringer.blogspot.com/2011/03/which-anchor-holds-best-14-anchors-are.html
I happen to carry a CQR #45 that came with the boat and a big fortress on my bow. On my last boat I stopped using a danforth after I lost my engine and was drifting into rock wall and I couldn't get it to set. Right before I went into the wall it grabbed the bottom. I was a little stressed after that. The next day I went to the store and bought a big delta anchor and loved it for several years.
http://billspringer.blogspot.com/2011/03/which-anchor-holds-best-14-anchors-are.html
I happen to carry a CQR #45 that came with the boat and a big fortress on my bow. On my last boat I stopped using a danforth after I lost my engine and was drifting into rock wall and I couldn't get it to set. Right before I went into the wall it grabbed the bottom. I was a little stressed after that. The next day I went to the store and bought a big delta anchor and loved it for several years.