I can't imagine taking a connecting flight over p.s.
Yes, the 3-cabin 763 will be nicer than p.s. F. I personally think even C in the 763 would beat p.s. F.
I know you said time isn't important for you. But if you give me a choice between an extra 2+ at my hotel, a restaurant, wherever, versus connecting through SFO, I'd go for the non-airport experience. Also, keep in mind that SFO is prone to fog delays, so you face the risk of a misconnect.