I think this is a pretty good deal for a 96 point wine, it doesn't say it's 96 Halliday points but I can only assume it's rated by him or similar (Huon, Tyson etc).
I don't think it's the 2011 Mount Pleasant Rosehill Shiraz, as that is $30 rrp and it says this secret shiraz is $27 rrp…
Sorry, not sure when the deal ends!
Also another secret deal, 94 pts for $144 a dozen, but I think the $160 dozen is better value with 96 pts.
http://www.mcwilliamscellar.com.au/products/5957-secret-2013…
Mystery brand from a website that sells 4 brands? What are they trying to protect? What are they trying to hide?
Partisan Black Label has the right bottle shape and awards. It has a price of $21.50 but since they advertise "Save up to 30%", the maths checks out. I wouldn't bother as 2011 was a terrible year for the McLaren Vale region (and the rest of Australia really).
The McWilliam's Appellation Hilltops Shiraz is probably your second link if the bottle shape, price and points is anything to go by.