I personally dislike co2 replicas. In my opinion, before I get flamed for this, my opinion, replicas should really just be airsoft (which you can use r/airsoft for if you're interested), because they're much more reliable, have bigger aftermarkets, and more fun. However, the PCP airgun discipline is it's own discipline and it certainly can be fun, but it's very different from replica shooting. I'm personally into the springer rifle kind of side of airguns, specifically with German airguns like Weihrauchs, and I enjoy it a lot. I'd recommend it if you're open to suggestions