My first foray into a separate streamer was the new Bluesound n130. Definitely a step up from my Macbook air. Super easy setup and works great with my iphone. Then, recently purchased a used Ares 2 dac. I was surprised at the huge step up it was from the Bluesound dac. I've been messing around with them both over the past few weeks and the Ares is just much better sounding to my ears.
Anyways, now I'm thinking of buying one of these less expensive streamers like the Wiim just to see what the difference could be. Maybe sell the node? We'll see. Long story short - if you already have a dac then try a stand alone streamer first. It might be all you need. Until you need something better of course! ;-)