There are many different 3-d printer models available in the market these days. However, if you are thinking of buying any of these, you need to exercise caution especially since not all them have the standard of quality you are expecting.
A team of engineers and artists working at the University of Washington has developed a way to create glass objects using a conventional 3D printer for the first time.

Features

With high-resolution image quality at around 600 x 600 dots per inch, the building materials are made of polymers. Thus, the finishing of the resultant

objects is smooth and gorgeous to look and feel. The support material is of a gel-like consistency and you can easily remove it with your hand or using water jet mechanisms. In this manner, you get to build very complex geometries even with the presence of very thin walls.

The inbuilt parts are strong sufficiently to facilitate rapid tooling especially for materials such as silicone. You can also use the 3-d printer model for function testing, form, fit, as well as vacuum forming mechanisms. You could even pass wires through these parts, drill some holes inside these, paint the exteriors and many other similar functions.
Alaris 30

This is a 3-d printer from Objet Geometries. Even though the brand appears to be quite nascent in the 3-d printer segment, it already captured a significant share across the North American niche. Using two different printheads moving along one rail building with thin material layers, this 3-d printer is not just super fast but also extremely accurate.