Hey DCM, we had this discussion about Shelton LAST year, in case you missed it. About the only one who wanted him was VA, and Shelton proved to be little better than Gandy was. And looking at his stats versus McIntosh's last year, it looks like a downgrade, especially since Shelton is an unmotivated player by nature.
As for Brees, he's an unknown like Culpepper is. For both it's "buyer beware." And Culpepper didn't look so hot BEFORE he got injured last year.