What would be an upgrade over the NAD M51 Direct Digital D/A Converter?


I am looking for some advice as to an upgrade over the NAD M51 DAC.  The objective would be to get my digital end to be more engaging so that there's less of a gap between it and my vinyl front end (Manley Chinook pre, Technics 1200 GAE).  

Would this necessarily require me to spend >$2k?  I'd be fine going used.  I have a Primaluna Dialogue HP integrated, so the replacement DAC doesn't need to have an independent volume control.  

jbhiller
These are great suggestions!  Thank you. I'm off to start research based on your help.
Of course every component may not mesh with you gear, but that is a tough dac to beat.....prepare to spend $$$

I use one for and number of sources and it sounds pretty good given its price....
jb:  I use a Cary DAC200ts in one setup.  Just using it for CD and Tidal, for now.  I think it sounds pretty rich and engaging, with upsampling and tube output.  Although lose some detail that way.  If that's not where you want to go, might not be that much of an upgrade over the NAD, if at all.  May be even a step backwards, depending on your preferences.  Probably could find one used eventually for around $2k-ish.

A Schiit and a NAD M51 are on my short list whenever I get around to upgrading a different DAC.  So, for selfish reasons, I'd recommend you try the Schiit and report back on your thoughts on how it compares to the NAD.  :)
You know you're right. It may be tough to beat this DAC without dropping a fortune. I may just need to realize that my analog front end is just better and my digital is very listenable just not going to be as good. 
Try a stand alone preamplifier. after trying the Auralic Taurus pre i couldnt go back to using the M51 as a preamplifier