I've had good luck with my small Lewmar Claw. I toy with the idea of getting a so-called "next generation anchor" like Rocna, Manson Supreme, or Mantus.
From the research I've done, I'd probably get a Mantus - seems to work well for folks who've commented, and much less expensive than the others.
Certainly wouldn't modify an existing, relatively proven design, unless you've got extras to mess with, and you need a project to keep you off the streets
Brian