I am looking for feedback on rearends. I would like to retain IRS for auto-x and road coarsing but I also like to 1/4 mile race. I want to run ET streets and continue to run them once I build my motor. So what I need to know is what is the best rearend I money can buy that will take a lot of abuse for a long time. Please list any feedback you have about rearends and what works.