MY man!

First, I appreciate that your comment is even longer than mine AND came with the multimedia.

I totally get what you mean about it being an occasion to listen to music with the old equipment. I had at least one portable CD player with no anti-skip. So not only can I feel some of that experience just through nostalgia, but then I start thinking about nerdy little kid me getting a player with anti-skip. It had a clear window on the lid, so I could see how the disc spun at 2x speed for while when starting a song or causing skips. I started to understand how it was filling a buffer and must have had a bit of extra RAM in there. And now middle aged me monitors and controls engine RPM all the time in my automatic car, lol.

On listening to MP3s, I see no issue there, but I have always been more of a videophile and less of an audiophile. However, I have also transitioned away from locally stored music, to just streaming from my Jellyfin server. Thanks to that practically eliminating audio size concerns, I just use FLACs of everything.

As high tech as that sounds, the server capacity also helps me discover music in the old-fashioned & natural way rather than algorithmically. When I realize I am missing some song I want, I will add as much of that band's entire discography as I have available. Then it's just a question of whether I listen to albums or random songs. Any songs that noticeably stroke my neurons the right way gets added to my single playlist of bangers, for when I don't want random or albums.

Finally, a manual transmission midsize sedan can still be had in a few non-BMW forms. I have actually been researching current fun-transmission new cars even though I don't plan to buy anything any time soon. Most of them will be performance oriented models that recommend premium, but most seem to be able to run regular these days with just reduced max hp. So just going off memory for now:

Civic Si - This might be your best bet. High fuel economy, great 6-speed, well equipped, well priced. I think it's in the Car & Driver top 10, with a 10/10 score, alongside the Type R which is like $20K more.

Mazda3 hatchback - ok it's not a sedan, but for some reason you can get a specific premium trim level of the hatchback with a really good 6-speed. It's also a FWD 2.5L that recommends regular unleaded.

Elantra N: 6-speed manual and 8-speed DCT available. Seems like an extremely fun performance bargain. Lots of tech and adjustability, including fancy LSD.

WRX: 6-speed AND full time AWD. I had one long ago and loved it. It isn't regarded as being quite as aggressive and refined as the Si and the N these days I think, but it's definitely a great all around vehicle and you aren't stuck with FWD if that matters to you.