Which of these cases is the best?

Yes but some of its price also goes to computer speed and performance via air flow. I'm not crazy about esthetics, I'd prefer that the computer runs well even if it looks like a potato. And reviews tend to be very technical on most sites, not to mention how they always lack comparison with other devices, a to-date price estimate and are biased as hell, which is why I'd like the people of this forum to tell me in layman's terms which one is the best.

I've modified so many cases over the years so even a cheap bad case can be corrected in about 20 minutes with a drill and hack saw blade.

I neither possess the tools nor the knowledge to modify a case. Could you please emphasize on how much of a factor to PC speed a case is, thank you.

Even a bad case can be dealt with by leaving the side cover off so a no-tech solution is possible.

There is no known connection between the case and a PC's speed.

Aside from speed and performance, do cases affect anything else? A case I was gonna buy that got removed from a local store's catalog was listed like this: "Bitfenix Nova, MIDI, ATX, USB 3.0, black, no PS". I understand what the last two characteristics mean (PS is PSU, right?), but I don't know what MIDI, ATX, or USB 3.0 mean. They must surely stand for something, right?

Example: https://www.youtube.com/watch?v=LFtC-9fLFEk


Nod to https://www.reddit.com/r/PCMasterRace/wiki/builds

While I can kick around the cheaps all day long I'd not go as low as they went. For example, I'd get dual core.

An AMD motherboard AM2-AM3, put in a Sempron 145 and unlock the second core.