Streaming is cool, amazing what is at your fingertips.
I bought an Aurender A10 as my one box solution for my first foray into streaming. Little did I know that I would soon step into deeper water and acquire additional digital technology. I've since added a musetec 005 DAC and it was a huge upgrade. There is a very long thread here about this DAC; there is some recent controversy regarding measurements.
I definitely agree that you should consider a new DAC as your next move, as a new DAC could hugely elevate your streaming SQ. You can always buy a new streamer after acquiring and setting up a DAC if you are still dissatisfied.
BTW, I highly recommend the 005. It is a phenomenal bit of kit IMO.