Which Psion 3a to get
I bought a 512K then gave it away and bought a 1M after a couple of
months. Here is why...
I bought the 512K first because I didn't want a Patience game and
I wanted a low battery consumption. The 512K only takes about 26mA,
which is significantly less than the 1M and 2M.
However, once I loaded on JBdata and any one other useful application,
I found I had to continually squeeze my memory usage to avoid running out.
512K just isn't enough if you want to add more software.
When I bought the new 1M, I chose it rather than a 2M on the assumption
that the current drawn would increase uniformly with the memory size.
This is not so.
Both the 1M and the 2M in fact draw 46mA, so this was a bogus choice.
Another reason for wanting a 1M or 2M is that it has the spell checker
on board, which may come in handy.
I am finding I am happy with just 1M rather than 2M, but I can believe
that I will run out again soon enough.
The Psion 3c came out about two months after I bought my 1M psion 3a.
I think I am content with the 3a.
In the UK they refuse to sell the version with the backlit screen,
so the only thing in its favour is a new agenda feature allowing
you to see a month at a time (just like the agenda on the old
Psion 3 in fact!).