Hardware requirments to run blender the best I am using blender to make a simple mold.  I will not do gaming or animation just make the mold.  Notice my old lap top of 5 years has an issue with the graphics a little and I think processing.  I am getting a new computer need hardware specifications run Blender.  I want this to be a window base environment.   Most likely have get from dell where you make your own computer
on line.

I know blender can do a lot more then I require from it.  I am using probably only 10 percent of what it was intended for.  I will be sending the mold file to a 3d printer.  Is there anything I should think about when sending the mold file to the 3d printer?

Thank you for helping me.
You can see benchmark results that people made 

http://download.blender.org/institute/benchmark/latest_snapshot.html

It depends on your budget