A bit more information would be useful as to why you are thinking of changing. Do you have problems getting the CQR to set and hold.
I have a CQR on my 36 and regularly anchor in sand and used to have a problem if too much chain goes over the side before the boat starts going astern as this tends to stop the anchor digging in. Not sure why but I guess it sits over the anchor and then spins it round.
I now drop the anchor by hand and once I feel it touch bottom drop it over the windlass and the wife takes the boat slowly astern while I let it out over the windlass. I can feel it bump and grind a little bit and then it digs in and we set the scope accordingly with out any other problems.
However I did have a Delta on my previous boat and could just chuck the anchor and chain over the side without worrying about it and never had any problems.