Ooh I almost got a Nikki at Nordstrom recently. I thought it was a really cute bag, and very good for my size - which is pretty much your size. I did not find it overwhelming, I've just been so unable to commit to buying any bag lately, so I left it there... even though it was half off! It sounds like you carry a lot, and I don't think it would have a problem comfortably fitting everything you need it to fit.