DAC/Preamp quandry

I used to have a great group of friends, most with very nice equipment, much better than mine.  They were mostly older than I, but also had more money to put into their systems.  But now, all who were in this circle have either moved away or passed away.  And since I have no dealers within about 200 miles of me, I've found myself leaning much on the opinions in this group and of course the normal AS and SP reviewers. 

Here's the background.  In the mid 90's I upgraded my system to Vandersteen 2CIi, McCormack 0.5, which has been upgraded with new a power supply and boards. I also have a Marantz CD player.  I am a retired electrical engineer and built my own preamp.  It was a temporary endeavor but turned out to last longer than I planned.  I've been pretty absent from the audio scene for the above reasons - however, since streaming has entered the scene, I've decided to move in that direction and upgrade a few things.  I'd like to continue to use the McCormack amp and the speakers while stepping into the new to me streaming/preamp world. 

I was just about to order the Wiim Ultra, and then a preamp.  I am considering the Schiit Kara F or possibly the Freya+ F  

However, while waiting a few weeks on a supposedly WIIM Amazon prime sale, I'm reconsidering (I do this a lot).  I've been reading about the Eversolo A6 and A8 and I'm wondering if I'm compromising myself.  I would have about the same dollar amount in the A6 Masters Edition as the Ultra and one of the Schiits.  The A8 is about $800-$1200 more than I was planning on spending, but I might be convinced to go that direction if the full streamer/DAC/Preamp combo satisfied my needs, likely for a long time. 

I'd love to be able to compare these combos for at least a few days, but that can't happen.  So, if you have some experience with these products and what might make sense for my current and possibly future needs, please feel free to comment.