Everyone needs a different bag. I can only relate my own experience. After buying, loving, using and then getting tired of my Crumpler shoulder bag I set out to find something more comfortable. I too did not have the luxury of stores in my area so did a lot of online research and eventually bought one when I was in Canada and finally had a chance to compare in the flesh.
I think you should maybe think about how it will feel to carry all that gear on a shoulder bag. This does depend on how long you will be carrying it, but I found shoulder bags to be annoying. Also, they don't work so well on a bike. So I went for a rucksack / backpack.
One of my main criteria was that I needed a bag to use as carry-on luggage. With recent restrictions this means something that will be less than 10kg and 40 x 20 x 55 cm. To expedite airport travel I don't check camera gear. So it needed to be large enough for all my camera and recording gear plus personal essentials.
To cut a long story short (full details with pix
here), I bought the Kata DR-467 which is 1 cm over the size limit but weighs under 1.5 kg.
One year on I am loving it. The only thing I wish for is a proper way to carry a tripod, but as I rarely do it doesn't kill me. I never use my Crumpler x Million Dollar Home.