It's hard to go wrong with any of the popular .22 cans. My nearly 10 year old SiCo Spectre II still works great and is a pretty impressive can.
I don't think Q was mentioned once the conversation switched to a 5.56 dedicated can because they don't make one. They also only make cans with direct thread mounts for tapered barrels or their own mount (no HUB). That can be a good thing or a bad thing depending on your mount preference.
For .300 BO, you have to decide if you want it for being actually quiet with subs, or a handier, shorter OAL.