And see, I would advise the opposite. Dedicated suppressors are where it’s at. Having 1 can for all types of calibers will never give you the experience and satisfaction of a dedicated suppressor. I started with 2 “do-all” cans and have migrated to enough cans for all my rifles, and a few pistols.$.02
Agreed, opinions are like buttholes. That said, I'd recommend getting one rated for centerfire. Get one that uses some sort of brake so you can use it on multiple things simply by putting a brake on everything. That means you size by the largest caliber you intend to run through it. A 30 cal for example that's rated up to 300 win mag will easily handle 308, 223, 22LR.