The new (Chinese) axles are ridiculously cheap! They basically put axle rebuilders out of business� It has been my experience that all of those axles are the same, regardless of where you get them (Ebay, AutoZone, or NAPA).
In my DSM racing world, we put out 2-4 times more power (than OEM) and yet these cheap axles seem to do just fine. After several years of using them, I must say that they appear to be a suitable replacement for OEM. In fact, they seem to be MORE reliable than the old, rebuild axles from Autozone.
Whenever possible, I prefer OEM. But OEM is hundreds of $$$, so they are not very practical. An alternative is to replace the boots on factory axles (assuming that the CV joints aren�t yet ruined). The problem is that replacement NAPA boots are $46 per axle and there is still a chance that joint are bad, where as you can buy a PAIR of new Chinese axles for $100 on Ebay.
I think that will buy the new axles, but save the old OEM units for a possible feature rebuild.