Battery questions

[thndrckn]

I have a Mp7.5 buggy converted with a 9l and mamba max, and I have a gorilla max revo with no brushless system yet.. Im thinking a mamba max and a 8 or 9 xl, but i am stuck on what type of batteries to get, I would like to get some that could be used in both to help my budget, but If I cannot that fine. Currently the buggy is not setup for batteries yet so I am open to all suggestions. I want to go with Lipos but not sure what to get..

Any suggestions?

thanks