We have sliding doors also. Every few years we put some 3in1 oil on them. Otherwise not a problem. Ours are not the tubular track you can buy at TSC, but just 1 & 1/2 inch pipe held up by J shaped brackets screwed into the ceiling - the bottom of the J holds up the pipe. The door has two rolling wheels that roll on the track. it is very heavy duty, and kind of overkill, but they always work, no debris, or other problems.
Some horse people like to allow their horses to stick their heads out of the stalls to relieve boredom. This can be accomplished in several ways - dutch doors, stall guards, pipe doors with a big V-shaped opening at the top for their heads only, etc. Stall guards are rubber-wrapped chain, and it does not take much for a horse to break them (they are more for temporarily opening the door to throw hay in or somethig similar and it keeps the horses in (for a few seconds anyway)). Allowing horses heads to stick out requires a minimum width aisle - so that they can't grab you or other things as you walk by. More often than not they will grab onto things hanging on the door front, like halters and lead ropes, blankets, etc and pull them off, rip them, eat them, etc. If we ever let our horses stick their heads out, we would go with the piping with the V opening.
You could put metal edging on dutch doors.. but the horses would still get into trouble.
The doors are double X-braced oak 2 x 4s with plywood on both sides. No problems with them.. we have a shelf on the door to put small objects and have hooks for halters.
If you are not going to get the swing out feeders or swing out water buckets, then you might want to put the door on the front wall such that you can open the door and just reach inside to dump grain in the grain bucket or reach in with a water hose to fill up the water buckets. I'd love to have the doors in the middle of the front wall, and have water buckets just inside to the left of the doorway and the grain bucket just inside to the right. I don't want to go all the way in the stall, both because I am lazy and also in case we have a less-than friendly horse.
Pete