Get the dual core. They are the hottest thing in CPUs. In 2006, you will see dual core CPUs taking over all retail stores. New computer users will have new dual core system in their homes or on laptops. Although, they aren't clocked as high, they run tons more efficient which in sense, makes it faster. Most of us do a lot of multitasking anyways, so dual core users will see an advantage there. They are also great with games too, although single core CPU can do well too. By getting multicore CPU, you get the best of both worlds, multitasking and gaming. You'll be ready for next year when more apps and games are coded to take advantage of this great technology.