All PicoScope 5200 series 60/200MHz PC-based oscilloscopes have a flexible resolution of 8, 12, 14, 15 and 16 bits. And a built-in 20MHz low-distortion function generator (sine, square, triangle, DC level) that allow you to do frequency sweeps. Combined with the spectrum peak hold option this makes a powerful tool for testing amplifier and filter responses. An sophisticated trigger tools allow one or more cycles of a waveform to be output when various conditions are met such as the scope triggering or a mask limit test failing.
60MHz 2-ch version is here: http://www.saelig.com/MFR00063FA/PSPC10BIT011.htm
200MHz 4-ch version is here: http://www.saelig.com/MFR00063FB/PSPC10BIT015.htm