If you want to do it in stages, first try using a different DAC. I believe the Node has only coax/optical outputs (no USB) but there are lots of excellent DACs on the market in your price range with those inputs. Just check the seller's return policy so you have a way out if you don't hear an improvement.
Streamer/DAC combinations
Looking for opinions on Streamer/DAC combinations. I am currently using a Node as my streamer and DAC. Considering upgrading. The options seem to be endless, so thought I'd solicit some of your opinions. My node is currently running through a McIntosh C42 Preamp into a McIntosh MC352 Power amp. Using Klipsh Forte IV's. The node sounds good, but I think I may be leaving something on the table in SQ. Not wanting to break the bank so to speak. Maybe spend in the $2-3K area for budget. Opinions???