Mulberry bags are beautiful but they cost several hundred pounds (or at least the one I liked from their website did - there wasn't much change from £900!).
I tried a Kipling and was hooked. I have several in different colours and designs. The Defea (Delta) I find wonderful for travelling and for dog shows where I need to be able to fit plenty into my bag but have my hands free. The Defea easily accommodates camera and sat nav in the separate front pockets, a book, large purse and all my other junk in the middle section and then another zipped pocket against my body for secure items or, in my case, show leads!
These bags do last for years. I used my Katie Hip metallic gold one for almost a year on a daily basis. My Defeas have been through the washing machine 2 or 3 times and have been used for travel and shows where they can get grubby.
With a Kipling you can organise your life. You can find your keys, mobile, etc. instantly. Also, they are so light, you aren't carrying something heavy before anything is even put into it. (I had a major problem with a KVZ bag for this reason).
I haven't gone for the TSV as I personally prefer some front pockets as I keep my keys in them.
I do have more expensive leather bags in my wardrobe but don't tend to choose them for daily use.