Mrs Browl and I are also going. The optimal viewing spot is on the lower right side of the baseball diamond.

There is a single pair of $20 tickets left for the actual performance. For that price I'd take the real thing over the simulcast.

http://sfopera.com/purchase/tickets/reserve.aspx?performance...

Tosca is my favorite opera by far. Saw it again last season in LA, great story and there are some wonderful solos. Highly recommended if you can get there.