Okay I have a canon gl2, but i'd like to know what the difference is between the XL1-s and the GL2...(other than the interchangeable lens system). Everybody said the XL1-S is amazing for manual and creative opportunity. What does the XL1-S have that the GL2 doesn't? I checked every spec on it, and the only thing I can see is the ccd size, and the lens system... is that it? Is the XL1-S's picture quality really that much better than the GL2?