I am trying to decide which of the three belt-packs to get.

I have a small number of lenses, but would only be brining one lens depending on what I would be shooting, so having a bag which can store 325235115 lenses is not what I want.

The most (in terms of pure camera gear) I would be bringing with me is a gripped 450d, a 430exII and either a 24-70 2.8 or a 100mm macro.

I probably will be upgrading the 450d (maybe to a 5d Mk II) in the future, so the bag has to accommodate a larger gripped body as well.