Update: The 18 inch DV8 is no longer being produced by HP. If you still want a desktop replacement sized laptop, check out the HP dv7 17-inch laptop with the lastest 2nd gen Intel Sandy Bridge processors.
The dv8 is your quintessential "desktop replacement" laptop. It's 18-inches and has a quad-core Intel Core i7 (Intel's most powerful consumer processor right now). This large powerful laptop is for you if you're a gamer or you just want the power of a desktop without all the separate pieces.
The standard graphics card is nVidia's 1GB GeForce GT 230M, one of nVidia's most powerful mobile graphics cards - purported to play Crysis (one of 2010's most graphics intensive games) smoothly at the medium quality level. The display is 1920 x 1080p, so this dv8t laptop doubles as a great entertainment device used for movies (optional blu-ray add-on and/or TV-tuner), HDMI port standard.