I vote xls in the bandpass.......I cant find ANY suspension options that will support the weight of the batts if you add 2 more amps. Along with the weight of the wall. This is staying a dialy driver right or you buying a second car? Besides you have the XL motors already. Just thoughts that im seeing now.
ACTUALLY I have an option # 4 but im not gonna post it here, but we can talk about that too