My dad and brother are both well over 6 feet tall and department stores simply don't carry many, if any tall items, let alone big AND tall! Bill's Toggery has a great selection of big and/or tall items (xlong ties, pants, shirts, big shoes, etc) no matter what your taste. They have casual, dressy, trendy, designer-you name it. Plus, the best part is their customer service.
Pros: Customer service, big and tall selection, overall great selection and variety of items.
Cons: A little bit of a drive from the main metro area...but Lion's Tap has great burgers near by!