Hey man, semi-high level sc2 player here (not amazing or anything, almost masters), greens will be fine. You super fast APM will develop over time with what ever keyboard you are using. You will grow used to greens while playing, and lets be real, its takes a good while to have a decently fast APM (actions per minute). I have used browns, blues, and reds, my favorite are browns, but like i said, its all personal preference. You are going to need a keyboard with the f keys, so when you get better you can use them for camera locations etc etc, but you dont need macro keys and things like that...Save your money, stick with your greens, and if you really feel like you need to switch (which you shouldnt), just get whatever switch you like the best. Its all about comfort and personal preference.