I love Soundgarden as well. It's hard to pick a favorite. I love Badmotorfinger and Down on the Upside, but Superunknown has my favorite SG song: Like Suicide. That song is just amazing to me. I also love Cornell's Euphoria Morning.
Maybe I'm in the minority here, but I'm not sure I'd want a reunion. As much as I love Cornell's voice, I think it's deteroriated over the years and I'm not sure he could pull off some of that old catalog. Having seen him four or five times with Audioslave, I've noticed that he's very up-and-down performance-wise. Sometimes, he just doesn't hit the notes well and it sounds as if he's reaching a lot. That said, if they did reunite, I'd sure as hell go :D.
"Copacetic, calm my frenetic, she's the shit y'all."