Well, if you're wanting to cosplay a specific person or character get as exact to their coustme/outfit as possible!
Take your time in making it...
If you're buying one...look around and compare prices/shipping/quality of EVERYTHING!
I remember looking for a Lulu costume from FFX and some of the ones I had seen where horrible and they were charging $550 for it O_O'
The pictures that you have posted look amazing!
Much money and quite possibly time has been spent to insure a splended preformance! ^_^
Hope that helps...