PeachTree Nova 150 is great with the LS50's. Better than my old combo of Benchmark DAC2 with Parasound A23 amp. I think the Parasound was the weakest link. The Benchmark DAC is better than the DAC in the Nova 150. Overall the Peachtree package is perfect with the LS50's. I actually made money by selling my old gear and buying a used Nova 150.
Darko has a review on PeachTree with the LS50.
Darko has a review on PeachTree with the LS50.