2,000 miles from a chain is extremely poor life. You're either taking poor care of the chain or measuring the wear incorrectly. I expect 3-4,000 from a DA chain, at least that much or more from a KMC and 5-6,000 from a Campy chain.
Prices vary around the world, but DA chains are NOT half the price of Campy in very many places. To compare chains of equal quality, the DA chain would be like the cheapest Campy Veloce. The only difference in the Veloce chain is solid pins and no holes in the sideplates to lighten the chain.
I've also not found the DA to chain to shift quite as well as a KMC. I've never considered Campy, KMC or DA chains to be the least bit noisy. In fact, I have a hard time understanding all these noisy chain comments. Either people are failing to lube their chains regularly or they spend a lot of time riding at 10 mph. Above that speed, the wind noise should drown out any minor chain noise.