I would jump on the ZDP-189.
You can get a G-10 one later.
ZDP is a great steel from what I hear and I've been wanting to try it.
Spyderco does their FRN right. It doesn't feel or look cheap and feels nice in the hand.
Or, a better option, buy the ZDP Dragonfly 2 and the G-10 Dragonfly and do a Blade Swap. Then sell the BRG VG-10 Dragonfly(or give it to your son) and you'll have a Foliage G-10 ZDP-189 Dragonfly.