Like anything else, good instruction is the key.
Dacron, to me, is the most frustrating material to learn with. It has so much stretch and creep that gauging the correct length can be tough.
Padding the loops is quick and simple. Don't let that be a deciding factor.
14 strands of some material is fine, with others it's not. Thread diameters can vary a LOT. 450+ is a pretty fat thread, and 14 strands in a string is overkill. 8190 and BCY-X are tiny threads, and 14 is too few for most draw weights IMO, and certainly not enough in the loops.
Even with the most expensive materials, you don't have a ton invested per string. When you buy a finished string, you are paying for someone's time and experience.
The best all-around high performance material on the market right now is BCY-X. If you want to stick with Dacron, then go with B-55. Halo, #62XS, or the new Power Grip are all great serving materials.
Again, instruction is the key. You can make a good string from the worst material, or a lousy string from the best material--the difference is how it's made.
Chad