Started with S3003 on ailerons, S9001 on elevator and 8Kg GigaLine MG on rudder.
After a while felt that I need something more and being tight on budget I switched to S9001 on ailerons too.

This was major improvement as roll rate is much better and I think (might be subjective..)
that also there is better resolution.

All the time battery pack was the same, Sanyo AA Gold 1000mAh 5 cell pack.

On any plane I wouldn't go for less than 1000mAh and 5 cell.