Markies, glad to hear you enjoyed the game and that it lived up to the expectations you and your friend had.
I'm also a big SOR fan, SOR2 might be my favorite video game, and I like to revisit it at least a few times a year. For SOR4, my girlfriend picked up the physical copy on Switch that comes with the soundtrack, but I haven't had a chance to play it yet.
I got pretty excited after seeing the various game trailers and gameplay vids, so I'm glad that most people think it's lived up to the hype. Also, I'm interested in hearing the new soundtrack, but glad that the retro tunes are included. I can't wait to finally give it a go in co-op mode, which will hopefully be in the next few weeks.
Also, had a chance to play SOR Remake a few years ago, and thought it was amazing, especially for a fan made game. The branching paths, CPU 2nd player, inclusion of vehicles, and remixed soundtrack were all great IMO. I wish we could get a physical release for SOR Remake as well.