Only Problem with the wreck is, that its a reserve...So unless you planning on shooting the cracker there with a camera, i wouldn't rate its a good idea.
We have been diving coney glen a lot lately and haven't seen anything, to be honest the guys that have fished that area haven't caught decent fish there in a while, apart from the odd leerie in the summer months and a Steenie in winter. IN winter when the swell starts pushing in that area its undivable anyway.