Wow, what a beautiful and dramatic back. The pictures of you standing at the alter are going to be fabulous.

I would try the French bustle first. That would give you the advantage of not covering up the lovely lace that drapes down past the waist. But this bustle is bulky and brides often feel that it accentuates their butt too much. The degree of bulkiness depends on a lot of things including how much netting is under the skirt and needs to be tied up with the bustle. Also the skirt fabric itself may not drape smoothly if it's a heavy satin. This will add to the volume of the bustle. 

If you find you do not like the degree of bulkiness, try the Ballroom Bustle. The simple fact that the fabric is folded up over the skirt to connect to the waist makes it weigh the part that's underneath down and look less bulky. But for you it will hide the neat lace below the waist in the back.

You can try each and see which you like better without hurting the gown any. The choice is up to you because only you can say which look you like best. 

~Lea