We just had a Zin tasting on Sat in our tasting group here in Reno, "Taste In The High Desert". We had Madrona, Klinker Brick, and Bogle as our top choices from the eveing.
I also like:
Sobon Old Vine Zin.... (2004) had a magnum 2 weeks ago at my sister's house
Cline Zin....the farm house winerry is really nice, andf the wine not so expensive for Sonoma County
Renwood Grands (either) are quintesential Foothills Zins, very good
Rombauer Napa and Fiddletown Zins....a little more, but the Napa Valley has a fruity taste to it while the Fiddletown is more earthy, Fiddletown itself is in Amador County, I believe, which is great foothills growing too
Goldhill Zin....on 49 between Auburn and Placerville, one of our favorites, and their Cab Franc is my wife's favorite