" Karl Grosvenor says: ..... I will stick with DVD. "
With a 27" monitor I'd certainly agree, don't bother.
I have two 42" plasmas and sitting at a normal viewing distance I can clearly see a difference between DVD and Blu-ray. Same with your photo example, displayed on my TV's the lower res/megapixal images are obviously not as sharp as my newer higher res/megapixal images.
Neither DVD nor lower res photos look bad on my TV's, but there is a difference and I can see it. :)
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