I'm looking at the Ritz-Carlton, Sheraton, Marriott, and Inter-Continental. I've got no status with any of these chains but at least I have accounts with Starwood, Marriott, and Priority Club (along with BA and all the major US airlines).

Sheraton's cheapest at $165/nt, Marriott/Ritz are most expensive at $235/nt. Any suggestions about which one to stay in?