On second thought, I will definitely NOT swap the magnets in the McCarty pickups. I picked up the guitar again today and was like "Nah, these are perfect right where they are."
The SE 245 pickups, otoh, I was more than just a bit disappointed in when I switched over to it from the McCarty. I realize now there's not enough high end in them. I love the mid response, and I think what I originally thought was high end was actually just upper mids. Because they're A5 mags, switching to A2s won't fix this. They do still sound great, but not for every style or tone of guitar music, only some. A good classic rock tone is practically impossible to get out of them, although typical heavy metal sounds great, and there are some nice harmonics on the upper string that they pick up on. I think the McCarty pickups are actually louder, despite the MC bridge being around 9k and the SE having been tested at above 10k by some owners, from what I've read. It could be that they just didn't have the SE magnets matched to the winding as well as the MCs were. "American-made" ain't no joke, people, although it's entirely possible that's the tone they were actually going for. idk.
If I switch the 245 pickups at some point, I wonder if I should also swap out the electronics? I had one guitar awhile back that I put SD distortions in bc I hated the stock pickups, but the distortions (which I love) didn't even sound as they should have, they still had the tonal muddiness of the previous pickups. I think it might have all been down to just the electronics in that guitar, even though the pots all read "500k", and all the wires were properly soldered, and there was no noise with the toggle switch.
This stuff can get complicated, man.
[ E D I T ]
Okay, I had a feeling that wouldn't stop naggin at me, so when I played the 245 earlier today, I had the JRAD silver archer pedal in front of it, and I know there's some kind of buffered bypass on it, so I got up, plugged back in, STRAIGHT into the amp, and the guitar sounds just as friggin awesome as I remember it sounding.
So strange, it doesn't seem to do this with my other guitars, but the Archer apparently sucks out a lot of the highs from the SE 245, or at least MY SE 245.
Yeah, I don't think I'll be switching pickups or magnets any time soon, I've grown attached to the treble.