I agree on the RWS 34 or 350 mag. Keep in mind, air guns are like anything else. The better ones are made in Germany or England.
As for you situation, one shot is a personal preference. I like to hunt with my RWS Diana. It can take small game easily. The are highly accurate too with or with scope. But the best thing is there is no ammo shortage!
I personally don't like PCP since it takes a lot to air them, btw.
With guns, we are 'citizens'.
Without them, we are 'subjects'.