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Brian, As I have the ES 6.7mm, as you know, and a couple of TVs in that range (5mm being the closest) I can assure you that the ES 6.7mm is good value for money (even at the new price) when directly compared in observation sessions. The advantages that TVs have is that they are pretty much parafocal in that swapping them doesn't require much (if any) focus adjustment, whereas the ES will (in direct comparison). Not sure if the Argon filling is just a sales gimick or not, but never had a problem with internal fogging on any EP of a recent design. Enjoy and looking forward to your comparison report.
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