Bomber KIT! End of story.

The Bomber kit is best bang for your buck Axial product. It has the most upgrades and is the most durable out of the box. It's worth the extra money. Besides, the RTR comes with garbage electronics.

The Yeti is not a great vehicle. The designed is flawed from the start.

You can get reliable, inexpensive brushless systems from HobbyKing or HobbyWing.