It's pretty good stuff that. Magpie estate are a collaboration between Noel Young (A British wine merchant based near Cambridge) and Rolf Binder who's pretty well known in the Barrosa valley. I've had a few bottle of that recently (the 2012 was very good). I've also got a bottle of their "The Election" 2010 slowly maturing in my wine rack.
The Black craft is quite a lot like the tim adams shiraz you bought, but you can taste the subtle difference between Barossa and Clare valley. Barossa is brasher, Clare slightly more restrained (For an aussie).
Penfold's Grange (Australia's most famous wine) is made using grapes from both valleys (And coonawarra and Magil as well).
Another Magpie estate wine which is similar and in the same price bracket would be the knock knock shiraz.