Help! I really like the style of the Tivoli, but don't know which size is right for me. I read somewhere that the PM is similar in size to a Speedy 25. Is that true? I don't have an LV boutique close to me, so I can't zip on down to see IRL (not that they have any in stock right now anyway). If those of you who own the Tivoli could describe the size to me, I'd really appreciate it. This is what I typically carry in purse: misc papers, zippy wallet, accessory pochette, compact, checkbook, LV sunglass case. I'm worried the PM is too small but the GM is too big. It seems that every LV bag I really like never comes in MM size. Argh. Oh well, c'est la vie. TIA!