Micro, even more protable, i like the lighter light to, and i like the size, mkes the pixles in the screen come together too, so it looks better, nice face plats too, i also have an SP but i like the Micro better., and i don't know about the guy abouve me, but the Micro does have a rechargeable battery, its too small to play old games, and it would get all screwy since it makes the pixles go closer together, your going to have to by a gba link cable a link cble adapter and a micro link cable to link, or just get a micro wireless thing and a gba wierless thing., and it hase an easy headphone jack, unlike the sp, you have to buy an adapter for headphones for the sp.