I'll either go with this, and upgrade/customize it, or go through Eiyame to get a fully customized outfit... just not sure which to do.

Here is my two bits. This costume is reasonably priced but it is from someone whose work is unknown to you. Eiyame and Pindragon are a known quantity here on the forums. You know that if you purchase from them, you are getting some really excellent quality.
If I was allowed to go anywhere near Cosplay, I would be going to Eiyame and Pindragon because members of the forum have gone there and been well satisfied.
Hope that this helps in some way. In the end, it is still your purchase and your decision.
Blue