I personally used the Naish carbon boom 190-240. IMO, i will not recommend it.
First of all, it is way heavier compared to other booms. Secondly, I have had this problem of the boom end popping loose when sailing, ...one side of the twin pin level burst loose during sailing ...unbelievable. So i ended up using duck tape to secure both sides of it. Can u imagine having to remove and put on new tape everytime u adjust the boom length?