Elie,
I think you need two 4400 Duralite LIMN batteries. Discharge is HIGH 20C and Chrage rate is 10C, non flammable and you can tell the state of charge at any time. LiPos are great too but you would always feel uncomfortable leaving them on charge without being present plus the fact you can damage the cells by over discharging where the LIMN can go to no voltage status and still be charged up to full capacity! Just a suggestion.
Show us some hover video soon
with that prop wash you may have a hard time walking to the plane LOL