You need to think about what you're planning on doing with the rotary table.
A 3 Jaw self-centreing will be better if you'll be doing lots of round/hex bits, but a 4 jaw independant does give you more flexiblity, however it will mean you become very proficient in the use of a dial gauge! I've never used a 4 jaw self centreing chuck, but it could be a good compromise.

Personally, I've not got any jaw chucks for either of my rotabs, and I've never missed having one for what I do with them. Most of the bits I do get held via T-nuts, however, I do have an expanding mandrel holder that fits in the rotab taper which is very handy.