McIntosh MCD751CD Transport / SF sfd2mk2DAC

I have the above transport and it has the Esoteric Cast Metal clamping mechanism (I don't think that most people know that). Itdoesn't have an xlr output so I use coax. I am using it with a Sonic Frontiers 2mk2 dac and like what I hear.
Anyone familiar enough with either to point where I go from here and which to upgrade first?
I use an ARC LS5mk3, Levinson 436 monoblocks ans 10T's.
Thanks for your input!