I was planning to build my own pc for the first time when somebody told me that it would be very dangarous and the componants may not work due to the fact that I choose components from different manufactures. Now these are queit reliable brand names (HP, diamond, creative, Nec, asus etc...)What do you think? Please reply if you have any suggestions or reason that I should not build it by my own. The person told me that the PC vendors uses "trial and error" and therefore they use "inexpensive componants".