Wd my book USB 3.0 1tb

Here is my system build cooler master cosmos 1000 amd phenom ii x4. 955 Black Edition ga-790xta-ud4 liteon 4x blu Ray reader khx1600c9d3k2/2g,2kts cooler master v8 sapphire HD 5850 Wd my book USB 3.0 1tb external HD cooler master silent pro m1000 I have a question,over on gametrailers they keep telling me that I should the internal hdd and throw away my wd my book USB 3.0 external HD.I just would like to know is the wd my book USB 3.0 external HD faster than any internal HD that they keep telling me to buy or should I throw it away?You can find the thread over at gametrailers.com in the hardware forum page!