I have PC's on my 29g biocube, albeit only 72w. Currently in the process of of upgrading to 144w, but still PC's becuase I want to keep the factory canopy.
My stocking list is listed below. As HumanIMDB has stated, I'be been told that I could not keep certain anemone's, SPS, clams etc. as well. But, I've seen listings of other people keeping them with PC's, so I'm not really sure.