After playing around with Juancho's 32C30X, I noticed it doesn't have any HDMI black level setting as well as advanced color calibration options, like the 32PB200. We really had to use RGB Limited on the source to prevent black crush. It seems that nowadays a lot of smaller, cheaper TVs have much fewer settings (other than Samsung, LG and Sony). I guess the option could be buried in the Service Menu, but we prefer not to mess with that.
My old Samsung 32R81bx and current LG LK430 had tons of settings available. The cheap LG even has ISF-certified color adjustment options.