Having gone from none to 8 in a year, I would say the important thing to me is weight. Beyond 10-11 oz and it’s too heavy unless run on a really short barrel. Echoing the above post on the scythe, it’s a great can but the reports of them coming apart makes me hesitate to recommend one. I am a fan of the AB cans. I have 3, 2 10 stacks and an A-10. For the money the A-10 is something I would recommend. Yes the Raptor is lighter, and an 8 stack is quieter and more versatile, but it’s twice the cost.
I would go 30 can for a first can and then add a smaller one if you still think you need a dedicated one later. I like a hub mount as it offers many options for attachment. Need a different thread, just buy a new endcap.
Good luck and you will buy more than 1.