Shaanxi: I much prefer Shaanxi Garden to Noodle Art. Another good (but very downscale) option is Chong Qing Special Noodles. I know it sounds Sichuan, but Chongqing province borders Shaanxi. The menu has much more in common with Shaanxi Garden than a Sichuan restaurant. Also try Northern Cafe on Garfield. It’s close to Noodle Art and much better IMO. It’s probably my favorite of the whole bunch. I like that you can look at all the liang cai before ordering.
Hunan: Our favorite is Dong Ting Chun (second floor of Ranch 99 Plaza).