FWIW, my first solution to this dilemma was to purchase a piece made by M-Audio called the Transit USB ($75) which basically did the same thing as either of these two pieces - it converted USB to S/PDIF and I connected the S/PDIF cable to my Integra so that the DAC could happen there. But I wanted better preamp and DAC performance for my 2-channel listening, which is why I went the NOVA route.
I don't know how either of these last two products stacks up the to the Transit USB I already own. But if they are extremely similar in terms of jitter reduction and so forth, then maybe I would just use that piece instead of one of these two. If the result is going to be be noticeably better using a piece like the Anthem to do the DAC and Preamp functions than what I am currently getting, then it might make sense to sell my Nova and Integra and pick up a used Statement D2.
I don't know how either of these last two products stacks up the to the Transit USB I already own. But if they are extremely similar in terms of jitter reduction and so forth, then maybe I would just use that piece instead of one of these two. If the result is going to be be noticeably better using a piece like the Anthem to do the DAC and Preamp functions than what I am currently getting, then it might make sense to sell my Nova and Integra and pick up a used Statement D2.