I'd like to point out agave nectar can be highly processed.
Another natural sweetening alternative is stevia. I sometimes add stevia leaves to loose leaf tea I'm brewing, though most of the time I drink tea black. I stay away from stevia extract though, since they can also be highly processed.
Maltose is often used for sweetening by my MIL and BIL/SIL, since both my nieces have a genetic disorder and the only natural sweetener they can take is maltose (no sucrose, lactose, or fructose, although for some reason Splenda is OK). Maltose is less sweet than most sweetener.
Oh yes -I thought I added stevia in there! I'm all about a little bit of all of them, to keep the body confused and working well, and to make sure there's not too much of even NATURAL sugars.
Agave doesn't spike your insulin levels like sugar does, but it can be highly processed, like you said, Cindy.