Whether or not you need 200 Mhz all depends on what you want to do. You can do a hell of a lot with a 100 Mhz scope (or even a 50 Mhz scope.)
Another thing to consider is the number of channels. Being able to display four waveforms at once (even if at a lower bandwidth and sampling rate) might have more value to you than a two channel higher bandwidth scope.
Hackable means that extra features (triggering options, bandwidth, decoding options, etc) can be enabled by entering a license code, and some people have figured out how to generate those codes which you normally have to pay for.
Personally, for a "beginner" I wouldn't spend too much money on your first digital scope. Scopes are like computers - they are only going to get better, cheaper, faster. Any digital scope is going to be better than your analog scope in terms of size, weight, power consumption, triggering ability, auto measurement capability, capture record depth, usb/network connectivity, etc.
I would also look at the Rigol DS1054Z - it's been widely discussed on these forums.