Well according to the Interzoo PDF on the www.tunze.com website, there will be three nanostream models. 6025, 6045, and the 6055.

6025 > 660 gph at 7w
6045 > 1189 gph at 8w
6055 > 1453 gph at 4 - 18w

The 6055 will be the one that will run by itself, or with the multicontroller. I'm not sure if you can adjust the speeds on the 6025 and the 6045.

hmmm I wonder how much two 6055's will be??