Curtis, I don't think that there can be one best answer to your question. :frown:
Coastal scents is good for micas, but so are many other places that carry Pearl ex. Delvies is good for dyes, but so are other places like US Composites, Alumalite and the like.
The colors of dyes and micas will vary depending on the manufacturer, so I would pick out the colors you want first, then look for the best price. Besides, that way you can do a lot of writing on your wish list!! :tongue::biggrin: