I am getting ready to do some PEX plumbing for the first time and I am
learning about the various types of PEX systems and connections. I have
done copper and PVC/CPVC plumbing before but I want to learn and start using
PEX.

Here's a YouTube video I found that explains 6 types of PEX connections:

PEXsupply.com - 6 types of PEX connections (time 8:35)

http://www.youtube.com/watch?v=iwvAzcJpM0k


Which of these types of PEX connection systems would you suggest or
recommend? I expect to be doing enough PEX plumbing now and in the future
that I am not worried about the cost of the tools. But I would be
interested in knowing how the different systems compare in terms of the cost
of the fittings, the brand or type of PEX tubing required for each system,
etc.

P.S. I also found these two that give more general info about PEX:

Plumbpedia 4 PEX Water Pipe Part 1 (time 6:50)
http://www.youtube.com/watch?v=6ZyVrw4gV5k



Plumbpedia 4 PEX Water Pipe Part 1 (time 6:50)

http://www.youtube.com/watch?v=NJMKVGSFc-Y&NR=1