[quantim]

recently had a 1987 Reserve Cab

Opus One had a few good vintages LONG ago.  Since they expanded the production and started outsourcing the fruit it went downhill fast.  Over-rated and over priced.  I've never met anyone who thought Opus was better than Mondavi's best reserve cabs.  JMO.

[Sthitch]

The '96 Opus One was by and far their best. That was the last year it was even worth drinking. I can't say that I can compare the Opus One with a Mondavi Reserve Cab, the Opus is a Bordeaux style blend, while the Cab is a single varietal, they are just different wines. If I had to choose between buying one or the other, it based on price and performance I have to agree that the Mondavi Reserve is the way to go.