Best spurs plastic or delrin?

Hi guy's I need to know what's best for spurs delrin or plastic, I have been told sometimes plastic is strongest and other times I hear delrin is best. I am stocking up on spare gears and need to know, I dont want to buy ten gears and then find out they suck. Any help would help.

[lutach]

Delrin is strong. I have a Delrin spur gear in my truck. Some plastic gears might be strong depending on the filling they might have. Carbon Reinforced Plastic can be stronger then Delrin, but the price higher as well depending on the amount of carbon.

[jnev]

Just get some of each, and and then tell us whats better.

[lutach]

I use metal (steel) spur gears on my other vehicles.

I will stock up on a variety gears, I have all of the traxxes revo spurs and now I'm ordering the delrin revo spurs from integy. Can anyone recomend a good hardened steel spur for the revo?