Really, I have some in14's that have been running fine for years. They're still nice & bright with no silvering or cathode poisoning. Sure, the 5 looks a bit different, but some other tube types are not as nice. in14's are inexpensive for their size, reliable & readily available.
Some people don't like the in14 using a flipped 2 for a 5, but in8's 4 digit and coarse anode aren't very nice either.
Many tubes with smaller or bigger digits may be better, but you'll pay more for them. Pick the tubes that you like and enjoy them. in14's are fine for their own reasons and I'm happy to have mine.