I would agree that the standard Carbon Express shafts that I have tried are some of the best ICS carbons out there. I also agree with Orion that the actual size that you use will depend on your particular setup. Having said that though I will also say that I think most folks' setups force them into the size 300 range though I do know folks that regularly use the 200s and I have personally used the 400s for nothing more than the extra weight.