Using both an OPA2192 and THS3062
Gain 1x, >100MHz bandwidth, 1mVrms noise, +/-10V differential input, +/-100V common mode.
High gain using only OPA2192
Gain 100x, 500kHz bandwidth, 14uVrms noise, +/-0.1V differential input, +/-20V common mode.
For a cheap experiment they're good value, the $15 of opamps is swamped by the cost of the display port cable but it has surprisingly excellent handling properties.