I am planning a biz trip to Tokyo, and the 3 preferred company hotels are:

Park Hyatt
Hilton Int'l
Keio Plaza Inter-Continental

I know Park Hyatt is one of the creme de la creme, and I'd stay there in a heartbeat but at USD300+ I may not get authorisation for it.

In terms of convenience and location, how do these hotels compare against each other? I will need to take the subway to the office, but will have time to check out Shinjuku.