I'd put the Edelux on the audax bike as they're pretty reliable and something I can trust during an all-night audax ride.
As for the SP and SON28, the latter is definitely reliable, the SP is too early to tell, but first impression is positive, think it's safe to go for the SP.
I'm considering getting a 2nd Cyo for my other bike. Would you say that the Edelux is worth the extra spend, as it's quite a bit extra?