Thinking about buying Christian Prayer...

[btdn]

If you are wanting to stay with the OF of the Office, then I'd do what I did: get Lauds and Vespers listed by Credo, and then stalk eBay to find a copy of Ad Completorium by Paxbook.  It's Night Prayer in Latin only, but it's the same thing each week, so you don't have to be a Latin scholar to get it.  This way, you get the major hours of the day without having to deal with any "ICEL-izations".

There is an edition of Ad Completorium available in Latin and English, with the proper Gregorian chants: http://www.saintaustin.org/adcomp.html.