Hey, Nowel, how much money you got to spend :-)? For a first PCP on a budget, I'd recommend a Big Ed tuned BAM B51. Thumbhole stock, good power and accuracy, Chinese clone of a very nice English rifle. The same gun in a standard sporter stock is called a B50, but I don't think it fits nearly as well. Expect to pay around $350.
If you have the cash, any of the Air Arms S4XX rifles would be tough to beat. The S400 is a singe shot bolt action, the S410 is a ten shot repeater. Available in a variety of configurations and power levels, priced from around $650 to over $1000.
If you're a tinkerer and/or like something modular, the Air Force Talon or Condor would be worth looking at. The Talon is the base model, runs around $450 as I recall, then the Talon SS, shorter but fully shrouded barrel for those with noise concerns, about $480, and the Condor is the power house, somewhere over $500. The nice thing about the AF guns is you can mix and match tanks and barrels, everything interchanges.
If power is your thing, look at some of the Korean rifles, most do in excess of 50 fpe, and the Dragon Slayer is a .50 cal. that's rated at 200 fpe, as I recall.
No experience with the Korean guns, but I've owned a B50, 2 Talon SS's with various barrels and other stuff, and just recently got an older AA S400 in trade for one of my Talons. No question, the Air Arms is top of the heap, but they are all good guns. I know there are lots of other choices, and I'm sure others will chime in. These are the ones I'm familiar with, and would feel comfortable recommending to a friend. BTW, welcome aboard, and hope that helps. Later.
Dave