If I get the job I applied for, I'm gonna buy this one:
Weihrauch HW-45
(In the US, Weihrauch is known as Beeman)
One of the strongest and most expensive PCA (dunno of you use this abbreviation anywhere outside Poland...it stands for pre-charged compressed air).
In Poland you don't need a license if the gun's power is below 17 Joules.
This one is around 9-10 depending on the pellets used, so it's pretty strong as for pistols.