Best significant upgrade? Dac? Preamp?


Hi guys!

Im hoping some of you with knowledge of my system can help me make a good decision about my next upgrade.
I would like a surprising and obvious difference not hard to spot subtle change.
From my research i think the next move should be the Dac.
I would like to explore DSD,i have some SACDs now.
my system:
Mark Levinson 320s preamp
(Would i see a difference with a ML no.52?) I am also looking at the no.52 ,would i see a big difference compared to the 320s? Worth the extra $$ ?
interconnects: Acoustic Research master series silver high definition RG6
ML 431 amp
XLR: +bo ? +ba ? Only info on them

Wilson Audio Watt Puppy 5.1 speakers (serie 7 tweeters) +transparent music wave plus cables
Arcam rdac (wifi) with Teddy Pardo power supply.
Running on mac air (usb) ,Tidal HIFI
(i currently listen most of the time to this vs rarely SACD).
Thanks!



128x128nicsaudio
I second the motion to spend money on room acoustics before spending more on equipment. It is 50% of SQ. You can find used ASC tube traps from time to time on eBay, or try locally. I treated my room and it was a significant upgrade. Now that my room is fixed, I am able to evaluate more accurately the effects of equipment upgrades.
Dac first for sure. So many good designs now and changing fast. Really like the moon products and much better output stage than the ps audio dac. With the mind option you can stream tidal etc. Very nice dacs from meridian as well. At your price point you may want to look at on-line companies which are making some excellent dacs-myteck (sp?) etc.
Can't argue w/ (carefully chosen and especially bass-trap type) room treatments, but I also agree that the right Dac can make a bigger improvement than you might expect.  For me, upgrading to a Schiit Gungnir Multibit (upgrading from a Stereophile A+ rated dac, by the way) made a surprising improvement in terms of overall listening enjoyment, and is arguably the new MVP in a system where some individual components are 5x its cost.  No DSD on this one though. It is warm enough that I would suggest trying it first before adding tubes to the system.  

Also upgrading a usb source from an (albeit older) mac mini to an Auralic Aries mini provided a surprising improvement and high ROI IMO. 
 
  
C_S, is your USB input on your DAC asynchronous?  Auralic doesn't have USB out if I remember correctly, wondering why going Digital USB from the Mini to Digital coax/toshlink from the Auralic would make such a difference.  Thanks
To paraphrase Bill Clinton, "It's the room, stupid". If you love your speakers, working on room acoustics & setup will give you the most dramatic improvement. Cheers,
Spencer