Keep in mind that some of these places may be all booked up already, or close to it. BlizzCon is only about a month away. So, if you don't have a room yet,
GET ONE! 
PS- hubby and I stayed at the Hilton the last time we went, was very nice and we got to see the cast of The Guild and Jay Mohr+wife in the lobby/elevator. This year, we'll be staying at the Hampton Inn. Haven't heard anything about it, but since it's in the Hilton family (and we most always stay at Hampton Inns anyway), we don't expect to be disappointed.
/edit: doh! we're staying at the Doubletree. But it's also in the Hilton family, so should be good.