What company do you think is the best?

my vote is Toshiba!

Depends on what thing your talking about.... computer... alptops... motherboards... CPUs... RAMs? what?

like the one that produces computers(example: toshiba, hp, dell, philips...)

I would say self-built, but of name brand ones, HP.

Dell is great, better than HP. Alienware and ibuypower have great gaming computers. eMachines and Compaq have good, cheap computers. Sony and Toshiba are good, too, but expensive.

I agree on that, but I'd add Mac on...

While I am certainly not capable of building my own computer, I agree that self-built ones far exceed store or Internet bought ones.  I will probably have a computer guru friend of mine custom build my next computer.  My last several computers have been Dell's simple because I like to pick and choose the components I want.  However, from what I am reading, Dell computers are no longer meeting the mark.  Heretofore, I would have opted for HP over Dell, but with my recent experience with HP's customer service department over a faulty printer, I will never purchase another HP product nor will I recommend one.