A tip for if you go with Virgin Atalantic...
Regular Price for Mar 07 - £520 each
Join Virgin Flying Club... Get a Virgin AmEx card (details on VA website)... spend anything on card in first 90 days and get 3000 airmiles... get the 'Miles Plus Money' fare - £290 each.
Also you can buy another 1000 miles for £30 and book both flights for £610 total... a saving of £430.

Pay for the flights with Virgin card and get more airmiles towards your next trip.
I stayed at the Gold Coast recently (and will be going back in March aslo)... like the Orleans it has a free shuttle bus to the strip.
It has a Poker Room, tho probably not as good as The Orleans, however it is just a short walk to The Rio and to The Palms.
Cheers,
Alan