I need help

I have a Gryphon Callisto 2200 and I want to use a streaming device with it. My budget for the device is $5000. Right now I use a Marantz AV8801 pre/pro for Internet Radio and Pandora. This is paired with a NAD M27. Originally, this two devices were for my HT, and still is. For playback I have an Oppo UDP 205.
For now, I am enjoying what I have but I want to see if I can get the Callisto paired with a streaming device. I am not tech savvy, so I am thankful for any suggestions that would come my way. I like many kinds of music from classical, rock, blues, folk, techno etc..I have Hsu MKII speakers for HT, KEF LS50 is on deck. A pair of JBL4312s and Harbeth SHL5 plus.I have a vintage MC240 tube amplifier as well.
I want to thank everyone for helping.
Lumin.  I have owned the A-1 and the X-1.  Outstanding App, easy to use and incredible sound.  Be patient.  Buy one used and get the best that your $5k will buy.