Getting back to the topic...
1) As much as Henry Morris might have thought that the age of the earth is a central issue in the bible,
…as much as he though that that believing otherwise was an attack on central fundamental doctrines…
It is really a peripheral issue.
2) IN MY PERSONAL OPINION: If the topic ever came up when you were attempting to witness to an unbeliever, the witness will be ineffective. It will become an unwinnable argument session (sort of like here!).
3) Rather than searching for specific Study Bibles, you would be better served by reading books that delve into the topic you’re interested in.
4) WARNING: Don’t use old material, it will be dated.
Henry Morris died in 2006 and a lot has changed since then.
Quite a few arguments presented by YEC’s have dropped from use.
Rob