good brushless setup advice

[secondwaiting]

i have the 4400 hv-maxx running on two 4200 mAh batteries (7.2v each) in my e maxx that has the UE racer x suspension and shocks that weighs about 10lbs with the motor and batteries. I was wondering if theres any brushless setups out there that will get me a little more torque and speed (and should i go lipo to save weight too? or keep my 6 cell batteries i have now). Also, do revos do better with jumping/bashing? i was thinking about going to the revo chassis with no alluminum to be lighter. thanks for your help guys