On Wed, 13 May 2009 19:24:16 -0400, Wes wrote:

I'm leaning towards the 4 jaw independent. Thoughts.

Wes

A 4-jaw will enable more precise centering and is more versatile,
3-jaw is quicker and more convenient. With a bit of practice it only
takes a minute or two to get something centered in a 4J to under a
thou.

You know what accuracy you seek. In my case, I have a 3J on my
indexing head and have a 4J for it that I've never used.