Love the dress! Absolutely stunning!
Personally, for the veil, I'd go for a single tier fingertip, tapered, with little or no embellishment on the veil, but with pretty detail on the edging. It will allow you to see thru the veil to the detail at the back of the dress with no distraction, and then you'll have a nice bit of detail at the edging where it just covers your tush.