E-Maxx BL System (Sub $400)

The 9XL setup should be fine, but don't expect to see all that the system is capable of until you can get some batteries that can keep up with the demand of the brushless system.

[jhautz]

If you are planning to only run 12 cells I would go with the 8xl or even maybee a 7xl.

IMO A 9xl may be a bit disapointing speed wise on only 12 cells. Especially if you are looking for speed runs 25% of the time.