Thanks for the replies. I went with the Sabre Red brand. I got some of their .54 oz keychain sprays, refills, as well as a practice round for each of the live .54 rounds, one of their 4.4oz Magnum 120's (with holster), a refill for the 120 Magnum, and a 9.2oz can of their bear spray with holster. I think I am set now.
I am thinking the keychain size will be what I carry every day, that's why I got a few. I am not sure I can use the bigger 4.4oz bottles much, we'll see.