On my 2001 F250 4x4 diesel I had the front upper and lower ball joints replaced along with the front shocks with components from Auto Zone. Their ball joints are sourced from a major mfg. and the upper end gas shocks are mfgd by Gabriel. The ball joints were so damn tight that the steering would not return to center by itself after completing a turn and was 100% sketchy driving for a considerable amount of time afterwards. I bought a set of ball joints from Ford but they eventually settled in and started working smoothly. Still plan on replacing the ball joints back to Ford OEM parts. Those Gabriel shocks? Scary shit there too. One of them seized up internally and bent and broke the shaft on the left front in under a year. Replaced them with a new set under warranty and within a couple weeks the ride was shit again. Another seized up shock. Dampening was lost and would bottom to metal about halfway compressed. Swapped them again for some KYB's and things were much better.
Of course I haven't had a whole lot of luck with OEM pieces either. Hub and bearings up front from Ford are super expensive and last about 50,000 miles. Four factory remanufactured steering gears on it at 222,000 miles so far. Had to change the original one at 110,000 miles when some kids in a Dakota tried to take the front end off and the only thing Ford offers is a factory reman unit. Can't seem to get more than 30,000 miles out of one before they start leaking profusely. Only warranted 12/12,000 and they aren't cheap. Replaced it a couple weeks ago with a lifetime guarantee unit from the local parts store and that fucker has so much slop in it you look like the Duke boys cooking down a dirt road at speed. The mechanic thinks the pitman arm is not fitting snug on the splines so I grabbed a new one from Ford to try today. If it doesn't fix the problem he gets to swap the steering gear again on the parts store dime.
Point is, proceed with caution. There are good pieces at the dealer as well as local parts stores. Sadly, OEM pieces aren't always the best quality anymore.