I'm populating a home hobby-lab to support some amusing experiments in 2- photon light-scattering vis Levinthals Paradox. Previous attempts proved unsuccessful. I'm improving test equip all-around. First item is a digital Oscilloscope ( replacing a data-logger ) : I'm looking at the Siglent SDS100-series: 4-channel 200-Mhz bandwidth. Will be used to trouble-shoot photo-transistor based detection circuits. Price ~ $700. I've always used HP/Tektronics or Fluke, but now retired I'm priced out of the grant-money market. Of-course the Goldilocks freq is 10^15 Hz, but you have to pray for sub-harmonics vis protein folding. Anyrate what do you think about the OScope choice ?