Sea Buck
As regards powder, they all have their own qualities. Each has its devotees and each has its detractors. And, of course the devotees and detractors all have a convincing argument. With the low stock levels you may find yourself just buying what is available.
If you shoot a lot, you will decide upon which is the powder you like, or (like me) you will decide that your choice of three powders on the store shelf has a lot to do with the mood your are in.
I am a lousy shot, a haphazard handloader, use awful technique, don't shoot competition, and so any recommendation I would make would have no credibility.