Welcome...from another newbie!
I'm not hunting squirrels, just killing them as pests in my yard, since they've starting doing damage to my suburban house. I bought a heavy AR (8.8 lbs + scope weight, about 10.5 together) and it's both good and difficult. The cocking effort on my purchase is 35 lbs, which is fine; but I wouldn't want more for extended shooting sessions (I'm practicing about 50 shots a day trying to work up to consistent targeting. My heavy gun makes it more difficult to target precisely when I can't use some sort of fulcrum; however, I'm killing varmints with it! I went from a 6 lb gun to one that's nearly 11--I'm 5'10" and 60 yo; it's doable just not optimal until I "grow" into it (or decide to buy a second, lighter gun).
If you're looking for a fixed barrel RWS, check out Airguns of Arizona for their special on the 430L (type that into the search bar). Super great price on an under lever; didn't see it until after I had made my purchase.
Also, once you've joined this forum, there's a discount coupon that might be useful for your purchase. Be sure to look for it.
I've killed 18 squirrels in the last two months (and that's mostly on weekends since I work full time) with my .177 air rifle; so, I don't yet understand the need for a .22 pellet. Most of my shots are under 25 yards, many inside of 15 yds. (Okay, so are all of my misses, too). However, if the .177 is killing them, I suspect that the .22 will be even more effective. If you haven't bought yet and haven't invested in the various pellets, perhaps starting with the .22 will prove the better choice.
I took weeks to agonize over a decision because there's so many great choices. I'm convinced now that a quality break barrel will be as effective as a fixed barrel. Likewise, the more powerful, quality break barrels (though heavier) will shoot just as accurately as the higher priced (but lower weight) PCPs, though the PCP are often preferred over break barrels or fixed barrels for the longer ranges and heavier calibers. As others pointed out to me--get what you want! Enjoy.
Arch_E