I think I'd go for the 440, Jay. Unless you're dead set on a fixed barrel this time. The power plants are the same, although I've never shot a 440, the Shadow 1000 is the same gun with a synthetic stock. Shot one of those a LOT, right along side my CFX. I'd rate the CFX as more accurate by a hair or two, the break barrel more powerful by the same margin. Both can be extremely accurate, and either one responds very well to a tune. The CFX is probably one of the easiest springers to shoot well, it's very forgiving of hold and not hugely pellet picky. Loading a CFX is a bit more hassle than a break barrel, but once you figure out a technique that works for you, it's not a big deal, unless you have extremely large hands and fingers. A quick follow up is never going to be as fast as the breakers, though. You could have the 440 shipped direct to your tuner and save at least one shipping charge. Okay, enough of my thoughts, hope they help, and I'm sure others will chime in.
Dave