decision: ds or 3ds

[cloud1161]

ive been debating about getting a ds for a few months now, but since the 3ds was released, idk whether i should simply get that instead.  i mainly want a ds to play some rpgs, namely golden sun, dragon quest 9 (i think its 9), and radiant historia.  would it be better to get a 3ds since it will be able to play all the ds games plus the new ones, or should i just save about a 100 bucks or so and get a regular ds?

EDIT: i dont care about 3d that much, but having the extra analog stick would be nice