I am going to replace with an OEM shaft.
I know I should probably upgrade after reading numerous posts with the same problem, But as I've read, the upgraded shafts also break. I guess I agree with one post that said the half shaft acts a shear pin. I don't know how much a trans cost to replace but I know its more than $730.00 and some greasy hands.
If you have replaced the half shafts youself, let me know how long it takes, and what if any problems you had.