iDrum looked like an alright deal at $49, but now it's gone up $20, yet the feature set is still the same. It's not bad, but it's definitely an entry-level drum machine. It doesn't support multilayer sampling, it doesn't have any way to apply effects to individual sounds (there should be multiple outputs; effect sends would be nice too). I can't think of a single drum pattern I've programmed where I haven't put some reverb on the snares...this would be impossible with iDrum.

The Redrum in Reason not only has effect sends but you get individual outputs per drum sound as well, so you can route them to a mixer and use insert effects as well.

I think if the price is going to get jacked up, the feature set needs to improve. I'll stick with Redrum and Ultrabeat, which are both way better than iDrum. If I do get another drum machine, it'll be Battery, which blows iDrum out of the water.