I just had to decide which FF program to focus on for my 2 year old now that we are buying him his own tickets. Literally starting from scratch. Ended up choosing AS so he can earn in one program across AA and DL, which is what we primarily fly along with WN. Ease of getting elite status was not a driver, but he is 40% of the way there for 2012.

You have WN A-list to cover SFO/SJC and LAS. AS with partners would fill in nicely for PDX, ORD, and MIA + International.