I didn't even know I needed this so bad.
I totally would, but I don't know if that makes it less sad or not. All I know is that it's possible we won't get an option like that; it'd just turn "For Glory" mode into "Star Fox & their Friend Little Mac."
If it gets us Melee-tier music, I'm totally down for the right price. I still listen to Smashing Live! to this day, so if it comes with MP3 downloads, I'll be there day one! Brawl's OST was okay, but after Melee's 90% orchestrated soundtrack, Brawl's MIDIs felt weak, and the main theme, one of the only 3 songs using an orchestra/choir that come to mind, wasn't really all that good/hype. I know My Music was the cause for some of that, pushing the soundtrack to almost 250 songs, but I'd be down with paying for quality, live music ala SM3DW and MK8.