Placing your batteries in a box on the front seems okay, but my favorite way is to use panniers (not pictured in avatar) http://www.arkel.com
has the strongest racks (with pivot) for full suspension bikes like yours. I'm always hauling beer or groceries on my bike and absolutely need storage space. Panniers have low center of gravity and hide the batteries from view. Just my two cents because they've worked well for three years, and are safe from rain.
edit: "Arkel" link is not correct, "arkel panniers" works though.
Ebike in use:
LWB Recumbent bike, Sram i-9 internal gears.
Power: 58V, 16 amp/hr, lipo batteries.
max speed: 52 km/h (30 mph),
max range: 40 km's, incl stop&go few times, minimal pedaling.
New build: Delta recumbent trike