Here's a site that gives info on not just the server location but also where the server data center is. Even though a server says west coast the server is hosted on the east coast. So for a good connection its best to know where the data center is located and then to pick a server in that location
http://swtorhumanrelations.com/2011/12/12/swtor-server-list/
http://swtorhumanrelations.com/2011/12/12/swtor-server-list/