They are plenty fast if you get a good kit, and a good engine. Around 40 with a sweet engine. They dont break easily, but 1/8ths hold up a lot better than st's. They are no harder to drive than 1/8ths or any other car. It doesnt matter what you brand you get (lost associated mugen). They are all race worthy. Just get the one which has more parts support at your local hobby shop.
IMHO I would get the associated rc10gt. They are race worthy, durable for beginners, and are fast. I am not saying it is better, and I definately dont want to start ANOTHER AE vs Losi war.