I ordered my Powernode 2 yesterday, but it was out of stock. Will probably arrive later this week...
I'm planning to use it with a pair of Magnepan MMGs, which have a flat 4 Ohm impedance. The PN2 is quoted at 75 W into 4 Ohm, so that should be fine. I'll let you know when I get to try the combo.
But IMO the PN2 won't have any problem with your Dalis. Give them a try and report back, will you? (Oh, and don't be afraid to damage one or the other when trying. Won't happen, unless you crank it up like a lunatic.)*smile*