......The problem with the X-tract (in my opinion) isn't the pliers, it's the handles. It's hard to get a good solid grip on both handles.
Hey trickknife, that's pretty similar to the list I would make. One thing I would add to tell the difference between med. and heavy is that for me heavy means I can use it to twist things without worrying about hurting them.
If you are looking for heavy duty pliers, look no further than the Wenger SwissGrip.Def