The 103 does not play 4K blu-rays, someone gave you false information. You need a 203 or 205 and those are demanding quite a premium these days.
Well, I'm probably the guilty party there. What I said originally was that the 103 "plays 4K BDs, but not natively," when what I should have said was that it outputs 4K, but not natively. Misunderstanding on my part.
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