I've got a really good deal on a "scratched" Dell E1705 from the outlet site. It has a great spec but has a 200GB 4200 rpm hard drive. Is this really slow? Can I use an external hard drive if I want faster? Machine is to be mainly used for internet, music, photos, video (not video editing), word processing. Spec T7200 core 2 duo 8X DVD/RW 2048MB 667MHz ram 200GB hard drive 17" ultrasharp WUXGA screen 256MB NVDIA Geforce Go 7900 GS graphics Vista home premium Thanks for any advice.