I ended up with a Mia Tui which takes everything - laptop, 2 notebooks, folder, all my make up crap, wallet, two phones and a tablet as well as my coffee cup. I was reluctant as I wanted leather but am fully converted after a thread on here about the usefulness of a cupholder.
It helps of course that i read the thread, checked out the website, then checked out ebay where I bought a more or less brand new one for about £20 including the postage.
It is mahoosive though - like having a whole other person to carry with me on the train but finally, I have everything all in one place. Am organised and turn up at multiple client meets with the right papers, in the right place at the right time.