Network Transport vs. CD Transport


So I decided to conduct an experiment. I pulled the old Marantz cd player circa 1999, around $400 retail, from storage along with few CDs. Using a coax digital cable with a $4.97 rca to bnc adapter from amazon, I sat down to listen. I played the CD, the ripped version (AIFF) of that CD, and a Qobuz redbook version thru my zmac Mini. Long story short...the reason why I did it was because there is something missing in the Mac Mini sound quality and I got tired of trying to figure out what the heck is going on. 
Anyways, that old cd player used as a transport into the Qutest DAC sounds considerably better  than the Mac Mini that right now I will need a few days break before I can can listen to the Mac again. I figured (assumed) that a dedicated network transport will pretty much better the Mac Mini and be comparable or better than what I heard with Marantz player as transport. Eyeing Auralic G1, Lumin D2 and Lumin U1 Mini as candidates (I need wifi capability), will any of these be comparable or better than let’s say a decent CD transport feeding the Chord Qutest? For example a Cambridge CXC, or a used high end player?
I can go back to spinning CDs, but figured I don’t want to give up on streaming just yet.
What are your thoughts - Auralic G1, Lumin D2, Lumin U1 Mini, or a dedicated CD transport for high quality playback. Forget convenience, let’s talk purely sound quality...thanks!

System:
Rogue RP-1, Rogue ST-100, Martin Logan Montis, Chord Qutest dac. 
128x128audphile1
Appreciate everyone’s thoughts and feedback. Since I started this discussion, night after night I proved to myself that a CD does sound a lot better than the same album rip played thru the Mac Mini. While I don’t doubt that running the Mini wired and adding bells and whistles such as EtherRegen to the set up will improve the sound, I still think that the sonic gap between the CD transport and the Mini is just too large to bridge. Yes, we can throw more money into the Mac set up with mods, etc. but...will it get to where the CD transport is sonically? I’m not sure. 
So I pulled the trigger on the Auralic G1 and it’s arriving next week. The G1’s wireless capabilities are appealing to me and will allow me to get the Mac out of my system. I’ll give the G1 a few days of continuous burn in before I judge it and compare it to the CD player transport (remember the Marantz player is over 20 years old). I hope it’s at least as good or better than the CD. If it isn’t, I’m down the shipping cost, and back to spinning discs. I also like the concept and flexibility of the CD player with digital inputs such as the Luxman 03x that was mentioned in this thread so this may be my fallback option. I’ll report back on what I hear from the Auralic. 
I'm using a Oppo 105 fed into my Marantz SR7005 for CD's. Comparing it to streaming was pretty close. However, Just picked up a MHDT Orchid. I was so impressed with the SQ when streaming, I decided to hook the Oppo up to it and bypass the internal DAC. Now my CD's sound amazing! SQ noticeably better than streaming. Probably wont go back to full time CD's, but its nice to know its an excellent alternative. 
@georgehifi
George I also have faith in the Marantz. I know what I’m looking for from the player and I have a pretty good idea of my system‘s capabilities. We’ll see how it goes.
This is my thought. I understand in the audio world that you can’t put a band-aid on equipment that is subpar. It is only as good as the limitations of the electronics. It took me a while to figure this out. I’m currently using a Cary Audio DMS600 DAC/Streamer that does both Tidal & Qobuz. I run it with a Cary Audio SLP-05 Preamp with the upgrade and with the Cary Audio CAD805 AE (Anniversary Edition) Monoblock amplifiers. My Turntable is a Clearaudio Reference with an Ayre PX5e Phono Preamp. My CD Player is a Sony SCD1 ES. I’m happy and love the sound all three sources put out. My Cary DMS600 gets as close to my other sources and I’m extremely happy. Streaming is coming along as technology improves. Pick a system you will be happy with and enjoy the music.