As for oud-themed Western fragrances (that may or may not contain actual oud) I'd say try to find Muthhela Agallocha Man which to me stands head and shoulders above the multitudes of barely different Montales that aim to imitate traditional Middle Eastern mukhallats (pefume blends) rather than actual oud. Tom Ford's Oud Wood would be a distant second on my list although I understand that a far less expensive copy of it produced by Surrati can be had for far less. Pue Oud by Killian is neither oud nor pure but misleading name and absurd price aside it's not an unpleasant fragrance.
I would try and sample both the well-known oud-themed synthetics mentioned on this thread and at least a couple of good pure oud oils like Oriscent Borneo 3000 or Kyara Koutan before settling for a fragrance just because it gets a lot of positive coverage on Basenotes. There have been many threads on oud vs "oud" here over the last few months with a lot of different perspectives and interesting discussions, you may want to do a quick search and check them out - they should prove very helpful in your research.