Hi gals, I have a city, and now I think that I want something bigger and I want to be able to carry the bag on my shoulders. Is the Part Time a good size? It's longer, but shorter, so I'd like to listen to your opinions. I normally have the following in my bag: a pair of pumps (to wear in office) an agenda wallet cell phone blkberry keys a few lipsticks. is the Part Time big enough for all these? Thanks!