New Ghukek miniature posts on Shapeways

In the material description, Shapeways includes miniatures as one of the applications, which is why I chose it. I haven't actually tried any prints using it. I have only really purchased one model in Smooth Fine Detail Plastic and one in Natural Versatile Plastic back when I put my first models up just to see how my design style turns out through Shapeways. I typically test and prototype on my own printer. If you are interested, I can make another test run including the PA12 and post comparisons between the different plastics.

If I was trying to break the bank, I'd order a couple of my models in brass. One can dream. 

I've placed an order for my Baltimore-class cruiser in Processed Versatile Plastic, Smooth Fine Detail Plastic, and PA12. I'll get back to you in a month or so when they arrive. 

From what I can tell of PA12, it might be what you're looking for. The size tolerances (for detail) are closer to SFDP but it's advertised as being strong enough for industrial parts.  The biggest drawback is its price, tending to be a tad more expensive than premium versatile plastic, however if it carries enough of the good qualities of both VP and SFDP, then maybe it's worth it for some.