Yeah, both of them seems way too close for my comfort. I've only got carryon but I do have to be in London that Friday night so I can't afford to miss it.
Since SJC has a 4 other flights to SFW before this one I'm given, I'm tempted to just show up early and try to standby for one of those, but between paying $150 and wasting all day for a possible standby, maybe I should suck it up and pay...