IIf you're going to play StarCraft properly you need to have high dexterity combined with the right equipment. Believe it or not I'm not going to endorse a single "gamer keyboard" that you'd see in the market. In fact all those keyboards are terrible for StarCraft; absolutely terrible. The keys are spaced incorrectly, the buttons depress wrong, and often times the keyboard itself is grossly over-sized. If you ever watch Korean TV or the broadcasts i do at
www.gomtv.net you'll see that not a single player uses one of those fancy "gamer" keyboards that i just spoke of.
Ok, first go to wherever you normally buy computer equipment. look for the cheapest keyboard, the ones in Korea are usually Qsen but other keyboards also work. What you want is a keyboard that is short on all sides, no lengthy bottom or fancy extra keys on the top.
Open the box and close your eyes and press a few keys rapidly in order, you don't want the keys to depress too easily because you need to hear and feel it when you hit one of your hotkeys during the game. You just want a soft clicking sound, not a hard one, whenever you hit any of the buttons; enough so it's audible but not so much that your fingers get tired when you type with it. The keyboard should look something like this:
Notice that the shift key on the right is longer than the control key. this is critical if your a Protoss player so make sure the keyboard looks similar to this one before your purchase. if you want you can buy two keyboards, one black and one white, but this isn't entirely necessary. Usually these keyboards run about 10 to 15 USD. Also, make sure this isn't a wireless one.