I'm based out of DCA and do about 30,000 miles a year to a good portion of the country outside the Northeast.

I've been USAir - Gold for the past year, but I was able to achieve that mostly on a mileage run last year. It looks like I'll be headed back to Silver for 2012.

This has got me thinking, and I'm wondering what most people fly out of DCA. I've had mostly positive experiences on USAir, but the rollover MQMs from Delta are appealing enough that I'm considering switching for 2012. I feel like USAir being a smaller airline, there is less competition for upgrades, etc...as opposed to flying on Delta.

Curious on folks' opinion. United/Continental is also a possibility as I occasionally fly out of IAD. Also just received Sapphire Preferred, which should give me a 50,000 start on the United/Continental program.

Thanks!