Originally posted by m42geo ... What I was talking about is that people keep saying this lens is great even wide open and I just feel is really not as great as I was expecting. ...
Man, I think you are missing big point here. You will need to define your expectation. There's no way any lens can take a "sharp" photo across the frame in your scenario (with variant depth in the scene). It's against physics, or at least the physics current imaging system's built on.
If you want to test formally, print out a chart, put it on a wall and take a photo straight at it. Make sure the chart is in a hyperpane of the lens. In this setup, all of the chart would be "in focus" (supposedly if you do it correctly) and crappy lens would have bad resolution on the border of the frame. At center, I guess there shouldn't be much of a difference whatever lenses you use.