Still one of the most important points: does the streamer's OS support the streaming services that you want to listen to? If not, it's not a good streamer for you. This is the reason I'm still using the digital out on a TeddyPardo moded Bluesound Node 2i.
Importance of streamer in audio chain
I have a wiim pro with a Deshelli dac 4399 chip and sparks op amps. Would I notice a difference by upgrading my streamer? My other equipment is a Rogue cm2 and Falcon Q7 speakers.