And glas is key but it is a bit overrated.
just curious, what type of shooting do you do, predominantly? I've put good consumer lenses on my 5D Mark II and L-glass on my wife's T2i, and the images that come from the (vastly inferior) crop sensor look tons better than those coming from the full-frame. just because of the glass. what's overrated about it? the superior contrast, the better color, the improved AF response, the softer, smoother bokeh? if you have legitimately shot with both L and non-L glass and have come to the conclusion that glass quality is irrelevant, then like Neuro above I'm fairly surprised you are discussing sensor image quality issues.