Since both units you have mentioned are forced air units, you are definitely headed towards solving your heat distribution issues.
Choosing between the batch load hand fed or the automatic stoker will take some analyzing.
It's your choice, but opinions here are not favorable towards combination (wood/coal) units. They will work to some degree...just not work as well as a wood only or a coal only will. There may be an exception to this, but please do not hold all combos as equal to that exception.
The combination solid fuel concept was mostly contrived by the sales/marketing gurus...not based on what would work best in application.