Phil me and the missus had one of our best nights ever in Prague when we went there for a week, watching the reds years ago.
I think it was about £100 each then, so looks a bit more now, and have included a link (although can't remember if we went with this company or not, so check around).
1. Chauffeur picks you up from your hotel and takes you to a restaurant that is either michelin starred or in a great place. Our 3 course meal really was one of the best we'd ever had, I didnt think food could taste that good. We went with the one overlooking the Charles bridge.
2. The chauffeur then takes you to the opera, and we had a box to ourselves.
3. Afterwards the car takes you back to the hotel or into the town centre.
The current price looks around £120-135, but that includes a meal, taxi all night and the opera - go'ed she's worth it!!
Prague Opera & Dinner Package - Prague Experience
Just dont do what we did and wear a tuxedo and a cocktail dress - we were so over dressed people were looking at us at the intermission.