Are you a fan of United/Continental? What is the best way to rapidly collect these points?

UA/CO seem to have the best flights from Beijing to San Francisco, meaning non-stop and leaving in the afternoon both ways. December of this year, wife son and I are planning 3 round-trips PEK-SFO, SFO-HNL, SFO-MCI, for Hawaii vacation and Christmas with parents. Best total price is about $6,500. 330,000 points, would reduce that by about $3,400.

I think American Express Membership Rewards points can transfer 1:1 to Continental, so I'm thinking getting the following cards:

AmEx Platinum 50k (try to bump to 100k)
AmEx Business 50k (try to bump to 75k)
AmEx Express Gold 75k (Can't find links or codes for this)

Mileage plus Explorer 25k (forget $25k for 10k pts, maybe 5k for add'l card)
Onepass Plus 25k (forget about $25k for 10kpts, maybe 5k for add'l card)

This is between 225,000 & 310,000 points.

FICO is 770+ so approval for the cards should be little problem assuming apply for all on the same day.

Thanks for helping line this all up.

Do you have the most recent link/codes for these offers or others?