The best mysteries in the English language

I love mysteries but I've realized that I tend to stick to my favorite authors over and over.  I'd like to expand my knowledge and enjoyment of the genre so I'm setting myself on a course of reading through the most highly acclaimed mysteries in the English language.  I'm going to do it by reading through the major award winning novels and those on the acknowledged "best mysteries" lists.  I have the awards and lists that I'm following on pages here on my blog.  I'll review each as I read it and I'm looking forward to enjoying the best of the best!