I prefer the AlumiConns as well. I do have a stash of the purple wirenuts I bought years ago, but with all of the controversy surrounding them, I don't think I will never use them.
Other than taking up room in the boxes, the only caveat with the AlumiConn connectors is that the instructions say you need to use a torque screwdriver to properly torque the screw terminals when you install them to maintain the UL listing. I think it's something like 10 in/lbs for the #12 aluminum wires and 15 in/lbs for the copper wires. Of course they can be installed with an ordinary screwdriver, but then supposedly the UL a listed is invalid. I wonder how they prove or disprove that the proper tool was used if there is ever a problem?
