I have the CPC disconnects and I love them, they make life a lot easier. One thing to consider when choosing a disconnect is that the Polysulfone QDC do not conduct heat so you can touch them when hot. I do agree the tri-clamp connections are the best (they are industry standard for brewing), however the CPC Polysulfone are a bit more economical.
Oh, BTW, one down side of the CPC disconnects is you have to drill out the "X" on the inside tokeep them from plugging up if running wort through them. A Dremel makes quick work of them though.