There is a saying that applies to most every part on a bike you can buy, "Cheap, Light or Strong, pick two." That said, I personally don't worry about getting the "high end" drivetrain stuff. As far as I can tell, you only lose weight when you go up in price, but you don't gain performance or durability, and similar to you I have broken a number of derailleurs. Rims are a bit of a different story. Generally, as you go up in price, you gain strength and lose weight. I’ve run wheels from Gravity (I think that is what...