Beautiful model. Congratulations
If it were me, I'd forego the (expensive) deployant last, as I find it typically adds too much bulk on the underside of my wrist, and makes it look unbalanced, especially with a relatively thin watch.
For straps, I'd place an order for a custom one at Camille Fournet. The possibilities in leather / color / stiching are limitless. For a daily wearer, I would probably go for a coffee colored calfskin, to tone it down a tad, with a rubberized underside for durability.