Comments on upgrading the DAC if you are going to drop the kind of coin on a steamer make sense. The comments on upgrading the streamer now and then the DAC down the road represent a good path. I’ve had the Node, Lumin D2 with S-Booster, Lumin P1, Auralic G1 stand alone streamer and now a Lumin U2 mini with S/Booster. I found improvements with a stand alone streamer. Synergy between your streamer and external DAC are important and the interface, supporting App is key, if you hate the interface or the brand you roll with doesn’t maintain, update, support you won’t be a happy camper. Both companies you reference are top notch when it comes to streaming, you won’t go wrong with either. I’d recommend looking at the Lumin U2 mini and upgrading the power supply unless your plan is to drop the same or more on an external DAC down the road. Generally, most will put more $$ into the stand alone DAC vs the Streamer as the return on investment in a Streamer once you reach a certain level drops off quite a bit. As mentioned, Power Supplies are often referenced as a big player in how a streamer performs. I currently use the U2 mini with a PA Audio Direct Steam 2 DAC.
Good Luck and have fun!