Grant,
This is a very important decision to make. When choosing a maker you need to check not only with their quality but also their timeline. Now, your distance from a lot of makers will also play in. There are some guys out there who are HORRIBLE when it comes to getting their product out on time.
One also needs to be watching to make sure that you get what you pay for. I have heard of some guys paying to have their harness made by a certain guy, then the work returned showed that they actually had the apprentice make the piece. There is a site called "Armour Archive" (that is a ".org") that is where a lot of guys who make today go. You can find reviews of guys who have not been very good with their quality or service. And you can find guys who are good with both.
It is very important, since you are piecing together a full harness, that you have a complete idea of what you want. That way when you get all the pieces together they fit, both physically and stylistically. I would encourage you to stick with one maker for this too, but that could be difficult. I would tell you too, do not get the mass produced crap. If you are looking for something to fight in as well as look cool in, get a hand-made for you only piece. It will be more spendy, but worth it.
Another suggestion, learn how to make your own

It will be difficult, but you will find wonderful muscular development from it
So, come up with the full picture in your head. There are a lot of places that you can go online to find full suits. I would suggest something in the area of the time you are trying to learn to fight like. I am personally trying to make one in line with my heritage too. That way it means more. Sum and substance of this long post: Do a lot of research first, as you are doing this, keep saving money. By the time you have a full picture, you might have saved enough to buy the whole suit. (of course there is the waiting...

)
I hope this helped a little.