Sure there are mainy different ratings but neverthenless the Top10 are mostly the same.
According the one I follow it is the Yongala Wreck at the coast of Ayr:
http://www.scubatravel.co.uk/topdives.html
The dive team at Ayr - Alva Beach has the fastest connection and the longest experience with the Yongala. They offer professional service, good equippment, helpfull staff & an nice aussie BBQ after the dives! I really can recommend them:
http://www.yongaladive.com.au/
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After a 35min ride on the Yongala Express we finally could roll back and get down to the wreck.
More details on the S.S. Yongala you can find here:
http://www.yongaladive.com.au/ss-yongala/
It is breathtaking when you see her shapes the first time.
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Not only the wreck, there is an unusal high amount of fish, corals, anything you can think of ... it is plentyful available!
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A lot of rare stuff too - like sea snakes, bat fish, nurse sharks, turtles
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Some of the remaing items of the ship - candeliers
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the engine
the toilets ;-)
There is really nothing compareable along the GBR as far I know.
On top this was my 200th dive - I am sure I won`t forget this one!
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Happy Anniversary
More on:
http://picasaweb.google.at/marco.schoeggl/No1DiveInTheWorldYongalaWreck#