I’ve had a Kona card for 3 years now…
My opinion is go AJA. I have 2 Kona LHe cards and they are great! Their tech support is wonderful… I had a card have some problems a month ago, and they shipped me a new card up to canada and had it here within 24hrs. My business associate who has blackmagic has had nothing but problems with his card. I know often it’s the luck of the draw, and I’m sure blackmagic has a good system, but you can’t beat a company that responds to email questions within 20 minutes when you have a problem, and ships you what you need as fast as possible…
Nothing but good things to say about AJA!
But that’s just me!