Looking for "safe", long-running Lipos for my set-up

[loa]

Hello,

(For those who read my other post, I've decided to keep my converted Revo as the official E-Revo is forcing my price too low! :-) )

I'm looking for good Lipos for my set-up: converted 3.3 Revo using MMM v1 and 9XL motor and a 20t spur.

I'm not looking for top performance as I'm usually bashing by myself and never race. Instead I'm looking for batteries that I'll be able to bash hard without fear of them puffing/dying on me.

Should I look for the highest C rating? Are there some brands better suited for general bashing then others? Would 6S be better (I was going with 4S before they puffed)?

Thanks

Loa