What caps to order?

[bandersen]

I'm sure the C-D caps would work just fine, but that's a lot of money for a cap. If you look at the data sheet for that $32 "general purpose", cap you'll see that it's really an industrial grade. Both the industrial and computer grade have rugged construction and high vibration resistance. Not something I'd be concerned about in a radio. Likewise the low DCL and ESR in the computer grade isn't something you really need.

So that leaves extended life as the only potential advantage I see. Unfortunately, I don't see any data on the life expectancy in the data sheet.