Ready to run kits won't have great quality parts in them and if the kit itself is away from a well known established brand name you need to ensure that parts are readily available, also be prepared to spend a lot of money upgrading the kit/ chassis to make the car worth having. Brushed motors aren't considered to be the best for drifting, you need the smoothness of a brushless motor system for drifting to work better. I think you'd be daft to not go down the ta05 ta06 route.. They are very worth where money and are of much better quality directly out of the box