Yeah, glad I didn't touch anything. I just left it at EVR Custom Pres. This is why I don't like messing with video settings - I don't fully understand what all of the terms mean (I've tried, but it all refuses to stick) and it seems like everyone has a setup they're extremely attached to, so no matter what I go with, I'll be doing it "wrong". I can follow directions if something breaks, I know when a video isn't being choppy and horrible, and that's all I need, I suppose.
One minor benefit I did notice with CCCP, though - when I had K-Lite, the karaoke effects on the Tokyo Mew Mew songs were messed up, leaving all the song lines half one color and half another. I just chalked that up to subber incompetence, but once I installed CCCP, the karaoke worked properly. Karaoke does nothing for me, so I can't say it's really a BONUS, but it's something that worked in CCCP but broke in K-Lite. So, yay for that, I guess? Ah, whatever. This setup works, the videos play, they look and sound fine, the subs are readable, I'm all right with this. Unless I come across a video that glitches up again, I'm not touching the settings anymore.