Great list FLskwat.
I'll say that the Herbalaire -can- do concentrates with some care and small modification with additional screens. I think the Q is hot enough to use concentrates, you just need to be careful not to let anything melt through the screen - so just stack screens if necessary. In a "der" moment the Verdamper and Herborizer XL would probably do them fine too.
I don't count the Lotus as a gas powered vape because the airpath is isolated, and it can reach very high temperatues. It was great for concentrates.
If oils are going to be your thing and you have glass, get the Eclipse H20, it's the shiz.