I let a guy who is in the car auction business (a buyer & seller) drive my Mustang. He stated he has had Rouchs, Saleens and Steedas, but he said he liked the way mine was set up the best (Eibach Suspension, Whipple SC, Griggs Racing lower control arms & torque arm), etc. (He also races a Porche at the track).
That said, I wish I had that 5.0 instead of the 4.6. The SC makes up the difference in performance for me, but the 5.0 has 4V (instead of 3V) and a red line of 7,000 (instead of 6,250). I'm spitting out 530 Hp, but the same kit on the 5.0 puts out 724 Hp!!!!!!! That would be AWESOME!
But, I've been driving mine since 2006, the 5.0 wasn't available until 2011.