I'm looking for a DS card. Here's my requirements: -need to be 99.9% compatible with all DS games. -i use DS only to play games, not to listen to music or watch video, so I don't need those extra function. -don't use up too much battery power. -retain 100% of the speed of the game -fast load time if possible -if there is internet brower to go online using wi-fi, that would be great, but not a req. -under 50USD. so which card should I get??? Also, do you guys buy cards+memory from the same dealers that sell DS cards? They look more expensive than amazon price for micro sd card... Thanks.