"Don't believe everything you read on the internet". William Shakespeare 1615
Living here in Europe, I used 50 to 60Hz conversion for years and in my opinion it's hardly worse compared to what you Americans are used to when you watch 24p movies in 60Hz (like movies on TV). This comes as no suprise, since converting 50Hz to 60Hz is just a difference cadence, but in it's nature quite similar to the 3:2 pulldown used to convert 24p to 60Hz.
This said, I think you can very well live with the conversion if 50Hz material is not EXLUSIVELY what you watch. Where did you read that the Edge fails in that regard ? I'm asking because I used earlier DVDO processors to do this exact conversion and it was fine (or, let's say, as good as it gets).
Also I watch my materials via media players like Popcorn and dedicated BD player will not serve well. Thus I am looking for a good proc to connect to my VT50. It is a shame that VT50 does not process 50 natively in US models.
Now with the Pioneer Kuro gone I'd still opt for a TV that supports 50Hz like Samsung rather than a Panny. Anything other than the Edge will cost >>$1k and it doesn't quite make sense when all it's doing here is to do something that should have been part of the TV's core function in the first place.
I've tried 50-60Hz conversion on the Edge, a sub-$100 Walmart BDP and Pioneer BDP-140 (little over $100) and they all do a very respectable job. How noticeable is the judder depends on the amount of motion in the content to a large extent. In any case 50-60Hz conversion should not drop frames like you say the Popcorn does.
BD players now play a lot of files via USB so it depends what types of files you have. What's little known is the US Sony BDPs won't play 50i DVDs and BDs but will play 50i files and output as 60i.
Don't forget computers usually convert 50 to 60Hz also.
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At $99 for a device with HDMI In and Out, you won't find cheaper and there are other options like the Sony box which will pass through 24p correctly.