Is a femto clock important if you aren't using asynch USB?

@dirkjanl and @erik_squires I wish the two of you would get together and publish a book "DACs for Dummies". I love the insight you both provide on this forum, but sadly I can only follow what you're saying about half the time (my bad).  However, I do appreciate Erik's attempt to break through the fog by closing with a warning against chasing a 10 year old DAC...

The Modwright is a good unit, but it might make more sense to sell it and put the money towards a new (or at least <3 years old) DAC, and go directly to my DNA1 (using the Bluesound for volume control); any thoughts?

Sorry, that was supposed to be @kijanki, not @dirkjanl 

@vonhelmholtz I read each of the replies quite carefully, including yours.  My understanding is that a femtoclock will not fix an incoming bitstream unless it is operating in async USB.  Absent that, the clock in my Benchmark DAC1 is probably good enough that I would not detect the difference that a more accurate clock would provide.  If you have an opinion on that, I would appreciate it; if not, thank you for your original input.

My best sound is with my Aurender's SPDIF output into my LAB 12 DAC 1's coax input.  In my set up it sounds better with the N200's clock than the DAC's internal clock in my set up.   Maybe a new USB cable rather than the fairly generic one   would equal my DH Labs coax.   Not sure.    

I had a few drinks last night and put about $700 in DH Lab cables in my shopping cart....  I didn't pull the trigger but I could use a high Quality USB and some longer RCAs

Thanks oddio, hope your late night drinking/shopping binge pays off; if not, at least you had an interesting night. ;-)