Ok so first off you mentioned the Volcano EPX and wanting a brushed monster truck "which the EPX is", but then mentioned the possibility of running a 2s Lipo. I'm not the battery expert but I've been told lipo's and brushed motors don't mix. One thing I will tell you from experience is stay away from anything Redcat sells with a brushed motor. Now I've been a supporter of Redcats products, I own several, but I will never purchase another brushed product from them. I run nitro and my son has a brushless Caldera which is awesome, but I purchased the Volcano EPX for my 7 year old daughter thinking the slower brushed motor would be a good fit for her first hobby grade RC. Well the truck itself seemed well worth the money, but surprisingly after 3-4 packs run through it we had smoked the motor. Redcat has great customer svc, I filed a warranty claim online and in less than a week a new motor had been shipped to my door. The problem I had was with the email I received. Now I'm not quoting word for word but basically it said that to be aware that brushed motors run very hot and that I shoud keep run times to 6-7 minutes. I couldn't believe Redcat sold a truck with an intended run time of 6-7 minutes. The 1800 mah battery that comes with it runs a little longer than 15 minutes and it's a tiny battery by anyone's standards. I never researched this before buying it, but had I known this I never would have purchased it. I was very close to getting her a Caldera as well so I could have the same parts but really didn't want to spend that much on her first truck or give her something with that much power. So needless to say, I've since repaired the truck and it sits in the corner looking all new.