A: I'm busy being sick so I didn't read the Q all carefully and shit but when it comes to real classic venues, I'd say Solnahallen (where Cliff Burton played his last gig; however, note that it's in Stockholm and therefor sucks major ass, don't go there), Lisebergshallen and hell, hm.
I can imagine that gigs at stadiums, especially indoor stadiums where better during the eighties anyway, atleast here in Gothenburg. Smaller, more intimate places, nothing like Globen with it's horrible acoustics (way to go stockholmers) - plus that the passion in the scene was way better than it is today.
Q: Ever killed anything with your bare hands?