Mark, I burned strip mine coal last year available from a local supplier in Scranton.
Then I got my hands on the deep mined coal from a friend who delivers to the local state hospital(when it freezes to the body of his trucks I get a 1/2 to 3/4 ton free!). I could not believe the difference in how much less ash there was and that there were little or no unburned pieces of coal.
This year I purchased 7 tons of the deep mined coal from Mt. Carmel PA. It burns beautifully and has even less ash (seems to be 6% to 7%). Mostly just powder in the ash pan.
I do not know this for a fact but I have heard that both Blaschak and Reading are strip mined coal. From my experience strip mined coal has shale and rock mixed in that cannot be completely separated, thus the "unburned" coal left in the ash pan. If it were me I would check around the area and see if there were alternatives to those particular suppliers of bagged coal.
I would expect that the two bagged coal companies products are in the $6 per 40# bag range. By my calculations that is $300 per ton. You can arrange to have some delivered from a deep mine down here for less than that after all is said and done. Just depends on being able to handle a large amount of coal and then have some buddies to share it with. You can get used bags from a feed store and solve the problem of having it bagged. I bagged 2 tons of my 7 and it took less than 45 minutes per ton once I got organized.
One thing I can say from experience, once you start burning the deep mined coal you will go to great lengths to find a way to always burn that!
I know I rambled on a bit, just wanted to provide a few thoughts to ponder.