The temp swings are really nothing to worry about. Like Steve said, the temps average out and in the end, I don't think the finished product would be any different in an Auber smoker verses an Analog Controller smoke.
The only time that the swings may make a difference is with Fish or Jerky. The difference between 140 and 160 can be a problem for Fish/Jerky.
I will probably eventually get an Auber. But, it is actually the last thing on my list of things to get. I have previously bought extra shelves, seafood shelves, Jerky Dryer, new side rails with more shelf racks, etc. I'm to the point now where the Auber is pretty much the only thing I haven't bought. So, I'll probably get one. But it will be more for the programmability features that it offers than trying to eliminate the temp swings.