Digital streaming options for my system are confusing

I appreciate your advise in advance as I am more of a old school vinyl/cd guy. I have a McIntosh MAC6700 integrated receiver. It has a DAC but tech in this area is evolving at such a rapid rate that I am confused as the best way to access a high audio quality streaming/digital playback source. I have heard hi end streaming services (Tidal?) are great but my Amp does not have a direct iPhone/iPad connector. What is the best way to go that will keep my system simple and easy for the whole family to access? 
Off track at this point, sorry. The Zen Mini sounds very compelling.
re gnrbob. So you are saying that if you ran my CC for an authorization of the depreciated value of demo gear in case I choose to scam you and keep the stuff) and offered me the same cost for new gear as the on line guys but as a result got me to buy from you that its a bad business decision? The morality question aside... why wouldn't you do this? And if you had vendors that would kick in a box or two for you to demo that got someone like me who has never heard of the majority of these manufacturers to buy there stuff?
If you want to make your $$ back for the shipping offer me a free tech walkthrough to make sure I have my system optimized and then suggest an upgrade somewhere? Seriously? I and about 500,000 other guys who love music would pay $50 for a better cable than I can get my local "magnolia" store....
Anyway, sorry this thread is dead. I appreciate your feedback and guess I am as frustrated at the overall process as I was in my lack of basic digital audio knowledge. I appreciate you all taking the time to reply.
OP, at the risk of being redundant, I just don’t believe that once a certain price point has been reached, that there is much of a difference between streamers when they are inputted into the same DAC.  The improvement obtained going from a $500 Node2 to a $5000 will not be a factor of 10, more like a is asymptotic.  My suggestion is to start with the Node2 and compare it’s DAC vs the DAC of your McIntosh.  After a while if you get upgradeitis, my next move would getting a killer DAC, that will enhance all of your digital sources.  After all that, if still not fully satisfied, buy a higher end streamer