Dubias, hands down! They are more nutritional than crickets and much, much easier to breed. They also don't smell and don't chirp.
I will say that I prefer crickets for newly hatched babies and on up to about 4-6 weeks old. I think that they are a little easier to digest and the jumping stimulates a feeding reaction better than the dubias scuttling. Once they hit the 6 week mark though, they do just fine on dubias as the primary.