There's a previous post in this thread (link at bottom of this post) that links to a good guide on how to properly adjust your side-view mirrors. Once I went ahead and did that to my passenger side, I've not had any issues with my blind spot there. I can see cars in the mirror no problem as they approach, and once they go out of view in the mirror, they are visible outside the window and out of my blind spot. I'd suggest others give it a shot before they start ordering up different mirrors.
http://blog.motorists.org/how-to-adj....wy7KY0e3.dpuf