I've owned the 5.11 Rush 72 for a while now and it's by-far the best pack I've ever used. Holds more than you could possibly need for a day of shooting. I've used it for multi-day travel as well as it still fits in a planes overhead. Durability on it is excellent, no issues at all.
Shood be good for your work stuff at all. If you think it's too big then maybe get a smaller size. I just like having one bag that does everything.
It's actually so good, someone stole my original one. Guess it was just too nice for them to keep their thieving hands off of.