The March version is the best one that I have seen Joe. However, I do have an appreciation for the slick oily look of Barrymore. I got the Barrymore version as part of a boxed set of "royalty free" horror movies.
I agree that the March version is the best.  A group of us just watched it again the other night and I'd forgotten all the nuances of his acting as Hyde.  However, there is something about Barrymore that is truly demented.  That contorted face looks like nothing with a human mind.  Brrr...