I like the mirrors and I am sure they give you a better view. I also have wide shoulders (and wide chest, belly, hips and butt
) I have always had issues with the mirrors on my bikes and seeing around myself. I was searching for new mirrors for my XC when I stumbled on some cool mirror extensions on FleaBay. They come either chrome or black. For what they cost (around $20) I ordered a pair of black
I am very happy with the results and being black they dissappear on the handlebars IMHO. They move the mirrors up about 1" and out about 2"
Here are a couple pics
Left is my bike without, Right is with them installed
Just search for "VTX Mirror Extensions"