This is apples to oranges, the 3DS is meant for playing games and is aimed at a young audience, whereas with the fire, you will be able to get stuff done done such as check email and be able to stream music in the background, unlike the 3DS. However, I faced this identical situation to this and I opted for the fire. I haven't looked back since. The kindle is a more capable machine and isn't a chastity belt. I happen to be typing this from my kindle right now.