Definetly dont get the g502. 12million dpi is useless, no one goes that high. Also it weighs a ton, 125 grams or something which is like double the most popular mouse, the final light ultralight pro. Get the g900 (expensive - the wireless is excellent), the gpro/g203 (may be uncomfortable) or the zowie ec 2a (bad buttons - doesnt matter too much). As for the keyboard, logitech has some excellent ones, or corsair, shop around and see what you like best. And for the headset, the hyperx alloy II's are pretty much widely regarded as the best headset now if you arent worried about money.