[Overdriven]

Like PBO said the 6s/2200 combo will get you there, just don't expect to make alot of back to back runs with no cool down time. But you could probably gear it for 50mph and play all day without worrying about temps. The beauty of a bigger motor with lower Kv is the greater torque and efficiency. The 8s/1520 combo I described in my last post could probably run around 75mph all day without overheating. But it's more costly and a little more complicated too.

As far as lipo's, there are better percorming packs than the Maxamps for the same or less money. My personal favorite is Hyperion also, and have used some Turnigy packs with great success as well. Check out the RC-Monster store for Hyperions that will outperform both those packs that you linked.

His fronts look like GRP, I think the rears are Ofna slicks which will never hold up. Get the GRP's and you'll have no worries about a tire blowing off the rim.