+1 The contis should last a decent time and fail through tread wear not blow out. Either the tyre was defective or the installation, adjustment was wrong or something hit it while you were on the road. Probably the latter was the case - I had a brand new tubular ruined 10 years ago after a piece of flint cut straight through the sidewall on its first ride, so strange things do happen. That said you should closely inspect the bike for anything that could have caused it if you didn't see anything in the road that could have caused it.

Another comment: 'most durable' is a compromise - personally I buy racing tyres with the thought that if a soft tread compound saves one crash ever (big difference in the wet), then the extra costs are, more frequent changes and occasional puncture are worthwhile. That said, most punctures are avoided by removing grit from the tyre after each ride.

Your mileage may differ...