Choosing an airgun isn't all that complicated, no need to be too studious about it.
Especially since we all know you can't stop at just one.
I'm up to eight so far - five handguns and three rifles.
Undoubtedly, probably, guaranteed more to come.
They are just so danged useful and fun, not to mention handy.
And they are guns in every sense; they're just not firearms.
So what's next?
I'm leaning toward that Colt inspired sixgun you mentioned.
P.S.
Dry firing might not be real good for it, as the pellet provides resistance to the spring pressure.
But an occasional one won't hurt.
More danger is from using gun oil in the barrel and seal.
Or any petroleum oil, for that matter.
It can ignite and cause detonation - i.e. an explosion.
I use silicone oil in all mine.
Kids like to do that just to see the gun belch flame, but it damages the internals.
Otherwise, enjoy.
The airgun places sell something called pell oil for airguns.
There might be a small vial of it in the package with your new gun.