For anyone who has the same dilemma, I ended up getting the Kata 3n1-11. It is THE perfect bag for me. It is small enough, it has a lateral compartment for a bunch of NEX batts, another lateral one for a bunch a microphone and some other stuff, a main bottom compartment for the NEX camera with the zoom kit plus more 4 spots for different lenses (I take the 16mm 2.8, the kit lens, the 23mm 1.7). It has an upper compartment where you can place keys, cables, a cellphone, a walled, glasses, papers, etc. An lastly it has a dedicated padded compartment for a tablet up to 10 inches! It also comes with water resistant protective cape.
I took this baby on a trip to Buenos Aires (4 days walking around the city) and I can say it´s an awesome super comfortable bag.