ORIGINAL: Kevin1963
I guess I'm still not sure what to do here ... is the 9010 servo I was looking at a good choice? Do I really need to step up the Rx battery? Is the only step up going to a 6V? What are the 1500 mah 4.8v or the 1000 mah 4.8v going to do for me that the 600 mah 4.8v doesn't?
A bigger 4.8 battery would be fine. It will also save you having to buy a 6v charger, something the others failed to mention. A higher capacity 4.8 pack will also take longer to charge UNLESS you get a better 4.8 charger. What will a larger pack do? It will give you more safe operating (flying) time. Even with a bigger pack, monitor pack health before each flight.