My question for you today is how important are things like screen update rate and memory depth? I currently own a Rigol DS1102E (100MHz) and am thinking of buying a Rigol DS4000 or DS6000 series scope (hopfully 500MHz) but I notice that even the 100MHz version of the DS4000-series scope is 4 times the price of the DS1102E... can anyone tell me if (in your opinion) the extra features like memory depth and screen update rate are worth the extra money?