Welcome to the forum! :D
You shouldn't need to change the pots - your LTD almost certainly has 500K pots which will work fine with the NB and HD.
However, you could upgrade from the Korean/Japanese pots to US ones (made by CTS or CGE) which are better quality, and you could also get a better quality capacitor for the tone control. It's not a necessity though, if the existing controls work fine as they are.
Since you're getting a tech to do it anyway, it might be worth seeing how much extra it would cost to upgrade the electronics.