Nerf = Fun. Yep, that's about it.
I've never tried any of those, but the Marshmallow crossbow and Mforcer are definitely worth picking up too.
I have both of those already sitting in the basement; the crossbow when done to the max outranges most homemade springers. And if you remove the trigger (or in my case, have it break mid-war), it makes for a pretty epic bow in its own right. Giant plunger tubes ftw!