Give me any malbec from Argentina or Spanish Rioja if you are talking bank for your buck. Sipping the Don David 2004 reserve right now... amazing wine.
Just returned from a tour of Napa. Stag's Leap wine cellar was my personal favorite, their fay estate reserve is a great cabernet sauvignon for ~85, silk in the mouth. My girlfriend preferred the cask23 one there, but at 180 go figure (and she needed 2 bottles).
I was impressed by the chardonnay from Clos pegase, great value. Cake bread had a decent one as well.
Not really an expert on these matters though.