I fly out of SFO and will put about 250,000 miles on United in 2000. Aside from the obvious benefits of the incremental 150,000 miles over the 1K requirement (miles, mileage upgrades, confirmed upgrades, top of upgrade list), does anyone have any experience with getting more out of United for logging so many miles? I have thought of working on elite status on multiple airlines, but United has by far the best overall routes out of SFO.