I have an '08 XLV and so far I think I run the heaviest ballast I've seen for surfing it. Keep in mind me and my girl are goofy riders but I have set mine up for regular. For regular I have 1100lb v-drive sac, 1180 center sac, 400lb sac on surf side seat, 400lb sac in bow, 250-300lbs in opposite side 1100lb sac for extra weight to get the ass end of the boat down (this does add push to the wake). For regular speed is 11-11.5mph and around 3000-3100lbs of ballast. For the goofy side besides the 1100 v-drive, 1180 center, and 400 in the bow, ill add 400 under the seat, 400 on top of the seat, and 400 across the back seat but towards the goofy side. So 3700-3800lbs to surf goofy with a nice big, long wake, at 12-12.5 mph. The regular side has a little better shape to the wake. Oh, and I never have more than 4 total in my boat but usually just me and my girl 90% of the time