I would pick a bulletproofed 550 rwhp 6.0L over a 6.7L or 7.3L any day of the week and twice on Sunday. In stock form, that is a different story. Once you fix the clamping issue on the top end(head studs) and remove the problematic EGR, the bottom end of the 6.0L is proven to handle more power than both of these engines.