US Air recently cancelled their agreement with my company for corporate rates. What are best alternatives among AA, DL, ATA, NW, or UA for FF programs. I am moderatly sensitive to price, and very interested in best program that enable status matching, complimentary upgrades, partner travel options, etc.

I am based at MCO (Orlando), traveling most frequently to SDF (Louisville, KY) and to the PHL/DCA/ORF seaboard areas.

I am moving regretfully from US Air, but the scrutiny from the boss is too much to stick around.

I am currently US Platinum, DL FF, HH Diamond, Avis mucky muck...., etc

Thanks for your help in advance.

PS: I recently posted this into the USAir Forum, but would like a broader perspective. Thx....