I just want to show you my x-2 with the best setup i have found:
Standard ballast full (650 lbs)
Bow ballast: two side sacs (2x250 lbs)
rear storage: two additional hard tanks (2x330 lbs)
no.1 left ballast: bg fat sac (600 lbs)
no.2 left ballast: 1000 lbs sac 1/2 full (500 lbs)
right ballast: my wife ;-) (135 lbs)
Total 3045 lbs.
With this setup i have a lot of fun only with my wife. No more people needed.
Here are some pics: