I think chronological Bibles are fine as long as you realize what they are: A way to read the Bible chronologically. I'd also say they can help with the context of the biblical
narrative because everything is happening sequentially instead of all over the place.
Of course, if you're going to do in depth exegesis or something you're going to use a normal Bible or the originally languages. But I don't think that's why you want to get this Bible!
Personally I'd go for the NKJV one because 1) I'd rather read the NKJV then the KJV 2) It's newer and has nice colour
3) It has study notes (I like reading different study Bibles).