I'm not sure what you mean by authentic, since there are different types of Chinese. Sam Woo's on Victory and Sepulveda has very authentic Cantonese barbecue pork and duck. I agree that it is more Chinatown level, as opposed to the best of the San Gabriel Valley places. (I have not been impressed with BBQ Unlimited.)
For the best Americanized Chinese in the vicinity, I recommend Bamboo Forest (not to be confused with Bamboo Village or Bamboo -- both of which I find terrible). It is on Burbank just east of Kester. http://losangeles.menupages.com/resta...
Concur re: Bamboo Forest. Well-prepared, tasty, and relatively cheap (but probably not too authentic) Chinese food.
This place has fantastic orange chicken/shrimp, etc., mu shu, chicken in hot schwezuan (sp?) garlic sauce and many others, just try your favorite dish here and you won't be dissapointed.
The best thing about this place is their chicken - very tender white meat, not that gristly dark meat that so many places serve.
Oh, and ask for the "crispy shrimp" (or chicken). It's not on the menu; they told me about it b/c I'm a steady customer. It's really great.
I will only eat Chinese from this place. None of the others mentioned in this thread even come close, especially for the price (their shrimp dishes are $10.99, quite a deal compared to other Chinese resto's, and the portions are a nice size too).
Sorry, you're going to have to drive, or compromise.
There aren't any. It's a topic that's been treaded and re-treaded. The best in the SFV are not in Sherman Oaks and are akin to middle-of-the-road ones in the SGV. The best in Sherman Oaks are terrible Americanised places like Bamboo and Bamboo Village.
The Westside, incidentally, is the same story.
If you absolutely refuse to venture outside the East Valley, the best you can do, as Hypnotic23 said, is Sam Woo in Van Nuys (Victory/Sepulveda NE corner) or BBQ Unlimited in North Hollywood (Sherman Way between Fulton and Coldwater Cyn).
You wont find any but I can share the few decent ones I enjoy in Sherman Oaks:
Golden Chopstix in Sherman Oaks 818/385-1389
Bamboo Village on Magnolia in Sherman Oaks 818/763-0083
Asakuma Rice (Chinese & Japanese) new in Sherman Oaks 818/461-9220
Sam Woo's in Van Nuys
BBQ Unlimited in North Hollywood
Report back after trying,