T-SQL Calander Question

I would highly suggest you create an actual calendar table.  Then you can get that information very easily.

Please see:

http://weblogs.sqlteam.com/dang/archive/2010/07/19/calendar-table-and-datetime-functions.aspx

If I used this approach how would I set the Week to be Monday to Sunday and display data for that date range only?

For example

Week 1 - Monday - Sunday --- Data Here

Week 2 - Monday - Sunday --- Data Here

So on and so forth