I'd like an "old man" solution as well for my 2009 WRX (single exhaust). KMA2 there are a bunch of threads out there but as you said, videos and forum posts can't really provide all the sound one would need to make a decision. I hope to run across a couple of people on this forum that are close to me (Sacramento, CA) and have modded their cars to stage 2 so I can pester them to listen to their cars in person.