ETA movements are better, but the Asian ones are by no means universally rubbish. I'm not comfortable recommending that everyone buy Asian 21j instead of 2836 reps, but if you trust your dealer not to offload crap on you, Asian movements can save you a lot of money.
One point I feel I should make is that, just like the Asians, not all ETAs are equal, either. The design is better, and that means you can get away with worse oiling and the like, but I'd prefer to go with a dealer that I can trust in case of problems.
I suppose what I'm trying to say is that a good dealer with a cheap movement is better than a cheap dealer with a good movement.
Now, if you're not short of cash, a good dealer with a good movement is the best choice. Compare getting a 2836 from Precious Time compared to a 2836 from Paulmart, for instance. Which watch would you trust?