One such winery is Rolf Binder, the former Veritas in the Barossa. Brands and labels are pretty much a dog's breakfast, as different names are applied for US and UK exports. Then some are sold here etc.
The bottom line is Rolf Binder makes good GSMs in the $2o/bottle price range. Last night I had the 2005 Rolf Binder Halliwell. This is a 60% Shiraz/40% Grenache blend. The taste is very plummy and a little fat, not overly sophisticated, but the right sort of wine with a hearty meal on a miserable night (weather wise).