i've got both and like em both. i use each for dif style of games. gbb are typically more fun to shoot (more realistic). gas guns are more problems if you play in cold weather, and the mags are more maintenance however in my experience the guns themselves are more reliable than aegs. gas limits you as far as mag capacity, where as aegs you have the option(depending on what game you r playing and what everyone else is using). gas guns are great if you need to be stealthy as they are quieter. it's personal choice mostly depending on style of game you play really because at the end of the day a hit is a hit!