Upgrade DAC recommendation

My systems consist of:
McIntosh 601 Monoblocks 
McIntosh C47 Pre Amp
Martin Logan Renaissance 15A Speakers
 Node2 DAC

I’m  bypassing the DAC in my Node2 and using the DAC in my McIntosh C47 My sound is good but I think I’m missing something  and believe the sound can be tremendously better if I upgrade my Node 2 for a better DAC. I’m willing to spend up to $5k on a new DAC
 Based on my system components, can you suggest a Better DAC that will take my sound Up to new levels

 need lots of help

fhanks