My advice would be for you to build your 3D printer from a kit. Opinions are going to vary on this topic. But if you do that, you will understand everything about it. Take a look at this thread:

http://3dprintboard.com/showthread.p...ight=Roxy+Iris That is my printer in the pictures. It takes a bit of effort to get everything together and working, but once it is going you are in a situation where you understand things well enough that what ever the problem is, you can figure it out. And on my printer... all of the plastic parts it came with were black. I made a lot of changes and printed the new pieces in different (non-black) colors.

You will have as much fun modifying your printer as using it!