I love Fenway as it is, we've shown that we can compete (and win) in the current ballpark, so why go the route of the yankees and attempt to knock down history?
As for expansion: booo. Look at how the nats have split the O's fanbase. I'm not saying that it would be the same with sox fans, we're a die-hard bunch, but still. I want my attention occupied by the sox and the sox alone. Could New England handle another team? Absolutely. Do we really want one though? Give Portland an AL team and everyone's problems are solved.