Firstly, I don't think it is. Price is wrong.
Having said that I can comment on the wine. IF you like your big Barossa Shiraz, then you'll like this. Personally I preferred the Greenock Shiraz as a little more restrained. MSV is actually a fantastic place to visit if in the Barossa. A platter on the patio with a tasting is the way to go. They also have a decent back vintage selection available to buy at decent prices too.
I'm nearly certain it is the Murray Street - didn't look at price, but the Halliday review matches. Good to have your additional thoughts - lots of people here seem to enjoy the BIG Barossa flavours