Thanks a lot!

You know it, Blaptica dubia all the way! I always put the dubias in the bowl just after the lightning turns off, before they've started to move around a lot. However, it's not long before they sitting at the edge of the bowl, taking turns eating. You often see at least 2 or 3 at the same time, so it's not hard at all to watch them eat. Since they have slow metabolism, you'd want to feed them just a few times a week. So, when feeding day is getting close, you can often see at least 3 of them sitting at the edge, just waiting for the food! They are not as delicate eaters as red eyes, but seem to be less aggresive than White's, for example.
A lot of people is complaining about dubias just playing dead and never move around and just get ignored, which I found strange. All of our six frogs (both species included) always eat every dubia there is, eventually (within one or two days). So, yeah, I personally recommend dubias for these frogs as well.