I'm looking for an oscilloscope to display various signals around a physics lab. No fancy features are required (signal decoding, FFT, etc.), but I will be adjusting the waveform a lot so I need a responsive UI. I've heard that the Rigol 1054Z takes a second or two to update after moving the waveform up and down, which would be a big annoyance for me. In comparison, I have a GW Instek GDS-2104E which updates instantly, but it costs more than 3x as much.
Usually I buy used analog scopes off Ebay, but they often turn out to be duds. Is there a modern digital scope in the price range of the Rigol with responsive controls? Thanks.