The nice thing about this design is that all the big & expensive parts on the DAC board are pretty easy to solder. SOIC pitch really isn't difficult at all, and it's easy to visually verify that there aren't any bridges. The four tiny ICs (U1D, TSSOP-8 and the 3 SOT-23-5 chips) are small enough to be easily desoldered. So aside from the USB board, it really shouldn't even be that daunting for SMD newbies, just get a few extras of those tiny parts and you should be okay. You probably don't even need the spares, since modern (low current) power supply parts tend to be fairly tolerant of shorts (built-in current limit). I've shorted the output of an LP2985 for 30-60s and it worked fine when I rectified the issue, for example.
The PCM2707 is, unfortunately, another story. Not only is it fairly difficult to solder correctly, it's pretty much impossible to remove without ruining the board.