I did not look into the XLM product. However, i did look at the AZEK PVC line and that was highly recommended by the contractor. The other two boards he showed me was the Trex Transcends and the TimberTech Earthwood Evolutions (composite capped with PVC). The Transcends and Evolutions was slightly less in cost and newer. I've seen a lot of negative posts about Trex, although I'm not sure if people are referring to Transcends. The capped products seem fairly new so I'm not sure what to expect a few years from now. I don't want to pay thousands for a new deck only to find problems with it a few years down the road.