But we are booking tickets for six people, so i dont think there will be a chance of op-ups lol, according to my dad he says that HKG-SFO flights are always quite full in CX so theres no chance aswell of an Op-up. But i did try out CX's new seat in 2008 and i found the entertainment the best out of all airlines! So i guess it would be CX but we will continue to consider. Star Alliance Miles are quite pointless for us and howcome the Taipei site is cheaper? Thanks!