We're in a wine club at an excellent local wine shop: those bottles are always $30-40 each and are always quite good. We've opted all-red, although they offer whites too. If I'm drinking white, it's probably a $9 Kirkland Chard or it's 100 degrees out and I'm drinking an ice cold Reisling.
Anyway, the reds. I like to grill steak, so we usually open the $30-40 bottles for those meals. For an everyday drinker, the $12 Rodney Strong Cab gets the job done. Pretty decent wine for something that's always available at Costco. I also am perfectly willing to drink any of the other Kirkland varietals in the $8-10 range....I guess that's a "rich man's Two Buck Chuck?"