I’m looking for a 20-30L camera backpack!

I currently have the Lowepro Photosport 200 AW , but it doesn’t hold all my gear + adventure gear anymore. I need something bigger.

My gear includes Canon 7D2, 3x lenses (one 70-200 tele), Mavic Air + controller, assorted adventure gear/ layers. I’d tend to want more space than less if given a choice.

I’ve looked into Lowepro’s ProTactic 350 AW and 450 AW . I really like it’s rugged and tactical design. The 450 seems a little too big since I like being able to keep my backpack between my legs on buses/ cars/ planes. Will the 350 accommodate a similar size? Should I go with a bit of extra room in the 450?

I’ve also looked into F-Stop’s 32L Lotus , and Kashmir 30L . Having already purchased the Medium ICU makes these an easier purchase. My concern is that they might be too big to travel with easily. What are people’s thoughts on the company and design of these two?

What other factors should I consider in a bag? What other bags or companies should I look at?

Anything helps! I’m trying to purchase NOW during these cyber Monday sales so anything helps!!