Are there any significant downfalls to selecting bookshelf vs upright (not sure on the correct term here) speakers? At the moment I'm favoring bookshelf, mainly due to concerns with baby (5 months now but, not for long) sticking things in speakers, knocking them over etc. What might I be loosing with this choice? Is it easier to 'baby-proof' an upright setup or just go for the bookshelf? Anyone have simliar concerns or experiences?