Have no experience with the quickbeam / SO, but... as long as the
crank and freewheel are within 5mm of each other, you should be fine.
If you're willing to switch to a 110 BB (which would put you at 44
chainline ) or a 113 (=47 chainline), you would be set (I doubt you'd
notice the difference with the 3mm disconnect). However, if you wanted
to keep the 107 BB, you could always screw the freewheel onto the
fixed side, which would put you 3mm off from the chainring and well
within the safety zone.
FWIW, I think the Paul hubs are the best fixed hubs I've used, and
I've used a lot. Light, well-designed (except their annoying, non-
rejection of the 42mm chainline), durable and good looking!
-Dan