I think he means he wants to do standing back-flips from a standstill and still be able to go 50+ all with the same set-up. 3S with the speedgear installed should do this.

Caution: do NOT run a pair of 2S lipo in series (4S) unless you want your esc smoked. The stock esc cannot handle 4S. Series is only for the stock NiMH's on the vxl3-m. If you want to run 4S (insanity in a Merv), you'll need to step up to a 1/10 scale esc that is rated to handle it.