I didn't know which e-cig I wanted either, but then I stumbled upon this thread: http://www.e-cigarette-forum.com/forum/ego-type-models/163146-ego-t-vs-go-go.html
Not much info about disposables there, but a lot of comparisons and pros/cons of various models by folks who have seemingly tried them all. I bought a Go-Go after reading it and have been very happy.