Jacob,You profile suggest you already have an Airforce cannon: https://www.gatewaytoairguns.org/GTA/index.php?action=profile;u=17814
I have not owned an AirForce or FX, but they are my favorite.
I'd name the Leshiy Classic, but it's not cheap.There's also the Evanix Rex, which is actually my first choice as described.
I have a Talon tunes top hat with no insert and get around 950+ with 31 gr. pellets. That is around 62+ ft lbs.
So basicaly looking for a 45 foot pound rifle (lets take 25gr.as "heavy" 900fps as the minimumby your collective "want list"......either .22 or .25) that starts off at under 6 pounds before you bolt any additions on it.If you feel like some "wiggle room"...are more rifles than you might think. Some a little heavier,some a little slower with heavy weights...some a good deal heavier....some restricted by design for single shot use.If you stick to your guns,just aren'ta "carp load"of PCP's that fill that cornor of the market.
For a dedicated lightweight pcp , my vote goes to the Evanix AR6K . I’ve got the bottle version of that gun and it’s the best hunting rig I have . It easily makes 50fpe in .22 and can shoot 39grain cast bullets with the best of them . The Evanix barrels love the JSB monsters .