The award-winning Picoscope 5000 Series PC Oscilloscopes are high-resolution tools that are designed with novel technology that allows the hardware resolution to be adjusted from 8 up to 16-bit resolution, ideal for small signal or distortion measurements. The 5000 scopes combine the high sampling rate of the 3000 series with the high resolution of the 4000 series. Available in 2 or 4 channels and bandwidths from 60 – 200MHz, they sample at a maximum rate of 1GSa/s. Memory sizes range from 16Msamples up to 512Msamples.
Details here: http://www.saelig.com/category/picoscope-5000.htm