I am still on my first PCP, which is a Marauder. I viewed it as a learning gun. Eventually I'll get something different, not necessarily better, but different.
Things to watch for in a first rifle,
1. Weight. These are pellet guns, and recoil isn't an issue. If it were a 30-06, a heavier gun might make a difference, but with no recoil, go as light as you can afford.
2. Bolt Pull. That's one thing I don't like about the Marauder. It's a very heavy bolt pull. I'd like a gun with lighter cocking mechanism
3. Obviously, accuracy. Can't go wrong with most reputable air rifles. I was shooting dime groups yesterday with a Gen 2 Marauder, and when it missed, either I pulled the shot or was getting low on air.
4. Trigger - read the reviews and get the best trigger for your purpose. Hunting needs a bit heavier trigger with bench rest a light trigger will do.
5. If you can get a regulated gun, that's better than just a valved gun. They tend to be a bit more, but I'd like to have a regulator, but don't.
If you want a learning gun to decide what to get in your "Real" gun, get a Benjamin Maximus. Click through the banner on the top of the page and use code AGNATION for a 25% discount, and someone said that Thursdays or Fridays are free shipping. It's $220 on the web site, - 25% is $165 in your hands and ready to shoot. Since you already have a bottle, refilling is no problem. and they shoot the Crossman Premier pellets fantastically.
Shoot it for a while and develop a list of your own criteria, then start looking for the gun(s) of your dreams. Just a thought as that's my style.
By the way, the Marauder has a good trigger, shoots well, and is inexpensive to operate. Bolt pull and weight are about the only things I don't like about it. Saving for an FX Impact at the moment, but by the time I save the $$, it might not even be available. It's several years away so my decision could change!