It's funny that in 23 pages in this thread there aren't that many impressions on the Hex. Maybe that is an indication that the DAC really is transparent, as transparent sound is basically no sound... Is there any way you could try giving a few more hints about its signature? Does it pass the "boogie" test for example?
Is there a dealer near you. I bought my Octave from a UK dealer and could have returned it in 14 days for a full refund. This may be the best way to know if you like it?
You know, I am not sure how you are to feed the Hex, but the source i.e. PC or Mac, USB to SPDIF or USB right in, the software you use for the feed all has a big impact.
The SQ you will get with a very good transport can be upgraded further with a decent computer feed. I got 20% at least in improvement.
Good luck with your search.