I really like Causeway Bay - you're central enough to be able to get to Kowloon side, the Peak, Stanley etc. You're also bang in the middle of a really vibrant shopping district and just a few minutes from Central if you want to get there.
The Excelsior is great - Trivago is showing me an outfit called
http://www.clever-hotels.com (admittedly I've never heard of them) who have it for your dates for £139/nt (so just a shade over US$200) incl all taxes