I am currently using a shelf I got from IKEA that is 16in wide and 47in across. the size is fine but it seems the metal brackets I'm using aren't strong enough since it's now bent down a full 1/2 and inch off the wall.

I need to find something that isn't ugly yet is strong enough to hold about 100lbs since I now have an EP2500 up there with the receiver.

This is an older picture but it gives you an idea of what the shelf looks like

http://i43.photobucket.com/albums/e364/jsotelo5150/shelf.jpg

Here you can see where it's been bent down because of the weight.
http://i43.photobucket.com/albums/e364/jsotelo5150/IMG_3025.jpg

Any suggestions?