Probably, since you’re asking, it is only a question of which you upgrade first. I’d say go for the streamer first and then get that signal as clean as possible and if you’re still not happy, go for the DAC. I noticed a huge improvement when I went to a Grimm MU1, connected via Ethernet cable, with the cable running through DX Engineering ISO-PLUS Ethernet RF Filters and using Puron power filters in the same outlet as the router. There was no audible difference between the MU1 and SACD. The cool thing about Grimm’s DACs is that they give the ability to up sample to either 2x or 4x. To my ears, it doesn’t get much better than the 4x up sampling. Links to the filters are below:
https://positive-feedback.com/reviews/hardware-reviews/puron-ac-power-conditioner/
Happy listening!