JR has some new HV models out that can take power directly from a 2s pack. Kinda pricey, but worth checking into since you've got ~$300 in servos anyways...
JR really stepped up and gave us what we need/want. No B.S. 7.2v right into the puppy. The price is a kick in the leg but they have a pretty good warranty too. Now if you others would stop pussy footing hows that 10s monster coming along