WHAT!!! Is the DS1074Z definitely upgradable to 200MHz??? I didn't think it was.
Are you not mixing up the DS2072 hack to 200MHz?
If so that answers my question, as I almost bought the DS1104z.
Sorry, I remebered wrong and
http://riglol.3owl.com is down atm, so I couldn't check.
But I hav a copy of that web app on my PC so I just ran it locally an you an only add these options (so far)
DS1000z device options:
DSAB - Advanced Triggers
DSAC - Decoders
DSAE - 24M Memory
DSAJ - Recorder
DSBA - 500uV Vertical
But I would still buy Rigol DS1074Z over a HP digital scope series from the early 90's. Or DS1104Z if you need 100 MHz BW, or even Rigol DS2072 if you're willing to spend a bit more.
We got several HP 54600 (model B I think) at work when they were new. They were extremely popular back in the 90's. I think the HP 54600 series was some of the first digital scopes from any manufacturer. But a lot have happened with digital scopes in the last 15-20 years since then. Prices has dropped
a lot for entry level DSO's, performance has improved, size (depth) has been reduced a lot with LCD screens, color screens has replaced monochrome screens and a lot of new software features has been added. Interfacing has improved too with Ethernet and USB.
If I was in the market for a cheap analog scope I would consider a used scope from the 90's. Analog scopes was already a very mature technology in the 90's, unlike DSOs which were a new technology back then. So for DSOs, a lot of evolution has happened since then, both with central hardware components like ADCs, FPGAs, MCUs and memory and also for software.
Some Agilent entry level scopes in recent years are even rebranded Rigol scopes, so even Agilent have approved their quality and price/performance and probably realized they weren't able to design their own entry level scopes at the same price/performance point.