One more thing, I believe the 580 comes in around 96 or 97 hp, todays 600's are pushing 110+. So I would almost guarantee a butt whoop'n if I went against a newer 600,
Plus it is what they are set up for, like I said that 600 MXZ kicked my A$$ off the line and it took me 2 miles to overtake him. I personally like the lower end torque for take off more than top end, I need that more often.