What is your favorite budget streamer?

In your $350 price range, I'd order both, the Bluesound Node 130 which as @coronado2 said, is on "special" now for $349 since it will soon be discontinued for the three new models of "Nodes" they have come out with, AND the Wiim Ultra. Test them out within the return period at Amazon and see which one (if either) is demonstrably better sounding to you in your setup. 

I happily have the a BS Node N130 on a system.

I know this will get lost in the rah rah noise, but look at a Hollis Audio Labs MS6 streamer with a GAN power supply. Little nuc based running W10, streamlined for maximum audio performance. Better than a famed custom MacBook laptop and even beats any Node variety I've heard by quite a ways. You can run via traditional monitor screen and mouse or headless using your phone to control Foobar or via Chrome Remote Desktop. Lots of tweaks to the operating system to maximize performance on audio only. Don't expect to play games on this guy.

HAL MS6 Server thread on Audiocircle

In my opinion, worth looking at for sure.

For my 2-ch system, I have BS N130, NAD C658, and NAD M12 streamers (all in their boxes), while I use my wife's (broken screen) Samsung phone running DeX to stream anything through a DeX dock and HDMI audio stripper to Coax S/PDIF output. Connect the Coax (or Toslink) to a DAC (volume controlled with the phone). DeX allows wireless keyboard control, and/or voice. Works great, sounds great, cost very little, practically invisible, and if you use a monitor (as I do) - then the phone and dock can be completely out of sight (as I have mine).

WiiM Pro which supports Amazon music. This is an amazing company.