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

@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. ;-)

@cheeg 

What kind of budget do you have? There are much better new/new used to be had.

All the best.

@oddiofyl 

I just changed USB cable on my NODE 130/Gustard X26 PRO from a DH Labs Silversonic maximum bandwidth to a Curious USB cable. The Silversonic was ok but had a hint of harshness in certain highs that really hurt my ears specially at mid to higher volume. The Curious has better clarity and brightness even so it actually is much easier on my ears, just much smoother all around, no hints of harshness anywhere meaning longer listening sessions. Just thought it might be helpful in your search.