Unfortunately I'm not really a fan of the materials Shapeways use, their prints come out with lines and there's a chance they'll ship it to you covered in wax. :|
There are other rapid prototyping companies out there, some of the more private ones produce far better quality work for the same price if not cheaper, tbh.
I have never had a problem with their work, and I haven't really found any other 3d printer companies online.
What sites have you found other then moddler? I wouldn't mind checking them out.