As far as an IRS goes, I personally hope it has one. I've lived with live axles pretty much ever since I've been driving in the early 80s, I now have an IRS in my 04 GTO - and I say give me an IRS over a live axle any day. If you've lived with an IRS for any length of time, believe me - you CAN tell a BIG difference between the two - it's almost like night and day. If you live somewhere where all the roads are glass-smooth, maybe you'd be hard pressed to tell a difference. But most roads aren't glass-smooth, and having a car corner on a bumpy road and not feel like it's gonna slide out from under you is a very refreshing change. Folks who mod their cars are gonna decry having an IRS, but I don't mod my cars and I love the sure-footedness and much better ride quality of the IRS over a live axle - so my vote is for the IRS.