The best component in my system will undoubtably be my EIZO monitor - Best KICK-ASS monitor in the Universe. I have by now gotten used to a nice 120Hz refresh rate, makes my eyes cope with the endless hours I spend before my beauty, better.
Other than that... mayby my 4MP Digital camera and my 2048Kbit/s ADSL
My MSI Starforce Geforce3Ti200 128 Meg video card with Video-In/Video-Out is by far my favorite. What a sweet little video card. Then the next one would obviously be my AthlonXP 1800+ being cooled with a Volcano 6cu+. Then I also like my FoxxConn 400 Watt Power Supply. It runs so nice and quiet you can't hear it anymore.