Is your visual Studio running like a dog? Have enough ram and your on a slick new CPU? Well the reason why it's slow might surprise you.
So most often than not i tell people to get as much ram as possible, a dual core processor is good a 64bit dual processor is ideal, Visual studio screams under a 64bit processor however if you don't have the ram and the hard drive then you won't be able to tell the difference.
Hard drive matters?
YES IT DOES. My laptop is allways chuging along because it's a dog of a 5400rpm hard drive, if you get a 7200rpm drive it'll make it faster a 10000 RPM drive will make things screem.
Ideally though you'll have two hard drives. one that your operating system runs on and one that you have Visual studio plugged into.
So make the most out of your visual studio and get the fastest hard drive you can.