I just tried Hunan Taste, a new (opened last week) restaurant in Catonsville in the same strip center as H Mart. Large traditional Hunan menu and, except for us, all Chinese clientele the night we were there. There is a two-page sheet of Americanized Chinese food — sweet and sour, General Tso's, etc. — but all of the rest is the real deal, including ox. I was with unadventurous eaters (my wife and two of our children) so I was the only one who ordered off of the traditional menu, but my dish was as authentic as Grace Gardens (albeit Hunan rather than Cantonese).
More of a restaurant and less homey and friendly than Grace Garden, but it is in a much less sketchy neighborhood. I'll go back next week with friends who'll order off the traditional menu, and we'll see. Right now I'm pretty excited.
Hope to hear some other opinions soon.