Matt,
I'm not knocking any of the various types of rear ends that are out there! I just think that if your going to road race on a track or launch off the 1/4 then, yes, 3 or 4 link is a great way to go but if I am on the street I don't want to have to stop to add a 3rd member on! I feel that if you are going to build an everyday driver IRS(Properly set up!) or Truck Arm are probably the most flexible in terms of varying road conditions. Again, I feel that 3 or 4 link is great for a controlled enviroment and the fact that they are infinitely tuneable is the hallmark of those systems but for everyday I think IRS or Truck Arm covers the most area. Of course, I am not as knowledgeable on this subject as you are and I want to make sure whoever is reading this post understands this. I am a regular joe trying to put in the most kick ass but lowest maintanence system I can. I would love to hear your thoughts.