I bought a ~2011 PRS SE Santana without stock pickups. It's since been a test bed for several Seymour Duncan (SD) and Gibson humbuckers.
I've ended up with a Duncan 59/Custom hybrid at the bridge. This was the only conventional SD alnico humbucker that had enough mids to provide some body on this...body. It sounds a little snarly, but it's nicely full and nicely bright. To tame the snarl a bit, I've rotated it backwards -- placing the stronger Custom coil toward the guitar's tail.
A Pearly Gates (bridge & neck), and a George Lynch Screamin' Demon, all sounded too scooped and thin. (And note that my Santana has an inherently darker-sounding body than your SE Cu 24 -- because mahogany neck, shorter scale, and fewer frets.) I concluded that all those pickups were voiced specifically for Les Pauls. Whereas on your typical PRS, with a thinner mahogany back, they just sound too fragile. The Screamin' Demon has ended up as the neck pup on my Telecaster, where it sings beautifully.
Gibson's '57 Classic family sounds heavenly on Les Pauls -- better than any other stock Gibson pickup I've heard -- and would probably work wonderfully on a PRS with a thick mahogany back (like an SE 245, SC 245, Tremonti, Bernie Marsden, etc.) I like '57's uncovered. But on my SE Santana, a '57 Classic neck pup presented the same problem as the LP-voiced vintage Duncan pups: It just sounded too thin and fragile. (Not as thin or scooped as the Duncan's, but still too thin.)
So I've just swapped an uncovered Gibson Super '57 (bridge) pup into my Santana's neck position. I think this unauthorized mod is a keeper -- this pup sounds nice and full. It's a little hot, so I've mounted it low, plus I'm keeping the volume pot below 10. The SD 59/Custom hybrid at the bridge is itself hotter than vintage, so the two balance well.
The Super '57 is a newer Gibson pup than the Classic Plus, and I think it will be the Classic Plus' de-facto replacement. There's general agreement that the Super '57 sounds fuller -- where the Classic Plus could thin out -- yet it's still nice and bright. (Using the Super '57 as an LP's bridge pup, with a little distortion, you get a classic Neil Young tone.)
I'll defer to others in recommending PRS aftermarket pickups. I just tried my first 59/09's -- on a 2013 Singlecut Trem reissue, where they sounded just a bit dark, so they might work splendidly on an SE Cu 24 (which has a thinner body and more maple). I always thought #6's sounded superb on first-run Singlecut Trems. 408's sound bright enough on a "Paul's Guitar" that I think they'd lack oomph on an SE Cu 24. I'm very pleased with the Starla Treble pup i've installed on my other, all-mahogany early SE, but Starla's would sound far too wispy with any Cu 24's maple. And stock SE 245's offer good value in basic, all-around humbuckers. (People upgrading SE Tremonti's to U.S. pups sell their SE 245 pups on eBay. I've bought a couple of those sets to upgrade sub-PRS guitars, with good results.)
So good luck modding your Cu 24. My expensive lesson was that higher-output alnico pickups can graft a nice LP-style richness onto thinner-backed PRS's, without the harshness of ceramic pups. But LP-voiced "vintage" pups just sound too wimpy on a lighter body.
