Muramatsu Serial Number List

Hello everyone,
Having just tried both of these flutes I would just like a little advice on buying one over the other.
My impression of the Ex was wonderful until I tried the GX which I then loved. We (the salesperson) and I decided that it had just little more of a 'presence' about it when I played it. But, had I not tried the GX I think I would have been more than happy with the EX.
Is there any other advantage to having the silver body over the silver plate?
Finally, I may be ordering my Muramatsu online. Is this a big no-no? It's just that it will be several thousands of $$ cheaper for me to do this (yes really!!) which means I can buy a GX overseas for the same price as it would be for me to buy an EX here. It might see a bit risky but seeing as though this is a handmade flute and I am buying through a reputable agent, I feel mostly comfortable with the idea. Thoughts?
Joolz