I would drive down to taco Bell, and ask the girl at the window about her choice for power plants on her air rifles. Spring, gas piston, Co2, do you want extra bean dip with your nacho bell grande? The questions are endless.

I think you should just buy all of the guns you want right now. Go buy a few break barrels, in all kinds of variations. .177, .22, .25. Hell, I think it makes sense to buy the same gun 2 or 3 times. You never know when one will break. Buy up a bunch of pcp rifles with all different sizes of tanks. And don't forget to bring a towel. You don't want to be in a middle of a carbon fiber tank purchase without having a towel handy. Wanna get high?

Buy lots of tools. You will need it for maintenance. Buy Allen wrenches, grease, feathers, ground beef, nuts, bolts, washers, an engine jack, and maybe a power strip or two. You'll thank me when the shit hits the fan. A quick bashing of the gun with the power strip fixes just about everything.

This is just a fun hobby to get into. The goose goes, Honk Honk!! I want a burrito. mmmmmmmmm immigration reform with a dash of hot sauce and sour cream.