Why are you getting move?

[Reasonable]

I have a PS3, an EyeToy, kids and disposable income.  I figure I might as well give it a go.

I just can't decide whether to just get the main controller and see how it plays using a dualshock or whether to go the whole hog and get a controller and a sub-controller (off topic am I alone in being amazed at how boringly pedantic the name for the sub-controller is?).