It will be 21 miners. I was considering using a dcx immersion system. Noiseboxes, with all due respect, I think are more for hobbiest / bedroom miners.
What is it that you don't like about DCX tanks? Anyway, their kits seem to have the lowest noise levels, their dry coolers are pretty good, but the overall system is over priced.
Foghashing is probably the best in terms of overall value, god products and good prices, they have the 120kw kit which can handle 24 new gen miners, total cost is roughly 17k, FOB china, including the 750L of coolant.