Baluns, in general, are the least important component in HF antenna systems.

The first question to ask yourself is why do you think you need a balun?

If you can't think of a reason then you don't need one.

If you CAN think of a specific reason then ask yourseslf, or somebody, what
type of balun do you want. There's very little to choose between them.

But to get anywhere at all you MUST decide in terms of numerical and
statistical quantities.

Please be specific. Or just copy the widely distributed, plagiarised, old
wives, average recommendations.

And beware of balun salesmen and sales ladies. There are more than one means
of making a living in our capitalist system. And everybody has a human
right, irregular or not, to make a living. Thus confusing baluns. ;o)

In conclusion - what's your numerical problem?
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Reg, G4FGQ