I have an 07 (same hull)...
I don't ride stock ballast, but can tell you that about 23.2mph at 75ft setting 3 is just fine w/stock.
When you decide to put more weight in, which hopefully "your buddy" will, I go 600lbs of lead in the back (roughly 300 in each locker), and a 550 sac in front, ride 80ft at about 24 mph and LOVE IT!
Hopefully your next post reads:
"How should my buddy weight his boat and what do you prefer?"