I pulled the trigger and ordered a DS1104Z scope directly from China! The waveform recording and replaying feature on the 1000Z series is optional but I decided to add that to the order anyway. In retrospect I guess it was a bit of an impulse buy (especially the optional item considering that I don't even know if I'm going to like it!), but oh well. It is going to take a few days for the shipping so hopefully I will have it in my hands some time next week.
Overall I paid slightly less than I would for a DS2072, which is the main alternative I was also considering. To be honest the DS2072 has a lot more going for it in terms of features and capabilities, such as higher waveform capture rate, deeper memory, larger screen, more knobs, and simply much more feature rich in general.
However, I really like to be able to own a 4-channel scope as I think it will help me as a learner to be able to see waveforms at various stages of a circuit. I also like the fact that it's 100Mhz instead of 70Mhz. For about the same money it all came down to the decision on whether to take a risk and go for a new 100Mhz 4-channel scope with more than adequate features in other departments (30k wfm/s, 64-level intensity grading, 12Mpts memory, 7" 800x480 screen), or a proven solid 70Mhz 2-channel DS2072. I chose to risk it
I hope I won't regret it...