Did you buy the TotalDAC or is it on loan? I'm not convinced that NOS is necessarily better, but I've been strictly R2R DAC since hearing my first Parasound. You should come to CanJam if you can make the trip. I'm gonna have the Stax DAC-X1t and Assemblage DP-75 as sources. The X1t in particular is probably the best I've heard...I kinda chuckle to myself sometimes while listening through it at just how good it sounds.
As for wanting tighter bass, the BHSE excels at that. It has a complete grip on those drivers that separates it from any of the other commercial offerings. Looks like you're almost there :)