All Comments in Descending Order on a Page in Wordpress

I want to show all the comments list in my wordpress 3.01 blog in a descending order by date with 500 comments on a wordpress page and pagination on top and bottom (a pagination plugin is installed so it's code can be used I guess). This list should show the first few words of the comment, author name, date, number of comments to that same post in brackets and a small direct link to that post. Also I need a dropdown on the top by which we can select an author and load the comments of that specific author only. I have the exec php plugin installed which allows php code in the pages and posts. Lightweight and clean code should be used with the minimum database queries required and page should be cachable by wp super cache.