The best PCP...

Not sure about the laws regarding deer or pig hunting in your state or where you migh travel to, but if eventually those are your intended query, I say .357. If you want long range accuracy, the .357 Slayer from American Air Arms is probably the best fit for your above listed needs. Sure you will get plenty of replies. This is just my 2cents worth.
 
I have a 457 Extreme. I have taken several Whitetail deer from 20 70 yards. I never tried any further but am sure it will kill up to 100 yards. The problem is all you get is about 3 full power shots ( factory setting) on a 4500 psi fill & it is a single shot.( kills fine for one shot @ 3500 psi). . But I never had the need shoot more than once while hunting so far with it. I think I am using 250 grain hollow points by MR Hollow Point. I think the rifle was less than two grand and any decent scope will work. Very accurate, the only weakness is the valve, works great , but will not take dry firing. I had a Quakenbush 50 Bandit IMO it was just slightly under powered. But it was a reliable killer up to 40 yard on deer.
 
Personally I would not shoot a deer with a .25 air rifle, not saying a well placed shot would not kill one, but the potential for wounding is way to great. Not sure about the .30 Wolverine, don't know the energy. But even with a 30 cal, would want a bullet/slug not a pellet. Probably 200 ft pounds of energy is about minimum on a deer,( just guessing) if you can put the shot through the brain, heart or lungs, don't hit the shoulder. That is what I like about my .457 Extreme, don't matter if I put the projectile through the shoulder, it brings them down. See some guy on youtube, killing deer size animals with a Benjamin Bulldog, think that may be 35 cal.
 
I would second AJ's recommendation of the high power Slayer since you're wanting to hunt. It's short and compact, only weighs 6.6 lbs and uses TJ barrels so it should be good for long range target shooting. The Daystate Hi-Lite reduces the weight to 7.5 lbs but it's still a long gun; whitetails normally frequent brushy areas where they can browse so the length might be an issue. Plus the .30 is on the light side unless you limit yourself to head shots only. Think Nutcracker's suggestion of a Bulldog is another good choice if you tolerate the aesthetics. It's also quite heavy at almost 9 lbs. The Air Force Texan is definitely powerful enough tough it's even longer than the Hi-Lite. If you enjoy tinkering you might consider getting a Condor and installing a .357 big bore kit with a large valve setup.