I think we should be able use any type of DW detergent in any machine regardless of make. I understand that water hardness varies and soft water tends to cause foam but as far as detergent type I can't understand what makes the difference. A powder is going to work as a powder does(well enough for regular soil, maybe not as well as a pac or tab on heavy soil), tabs as tabs do, and pacs with multiple detergent types(powder, gel, engyzmes, bleach) in one pack will operate differently than all of the above.
Seems like manufactures are now recommending detergents in the user manuals. This is usually because they have signed a marketing agreement with the detergent manufacturer not because that is the only detergent that will work well in the machine.
Seems like just buying any good brand of detergent would work. I would first try your usual detergent and see what happens.
Please let us know how you like your new machine and have fun with it!