Good and Cheap brushless motor = Robitronic Platinium?

[duarte7]

Well as the title says i am loking for a brushless motor for my b4. My Losi 6.5T is sort of tired and losing performance. The question is that i dont have a lot of cash to spent, so i started loking for the Robitronic Platinium engines, are they good? I would like to ear some feedback. I am open to other brands but have in mind that i am not loking for an expensive engine.