Series 5
If the Series 5 doesn't win a landslide in that list...
I'd probably buy a new S5, even if it was the original specification (perhaps swap the serial port for USB), but an updated S5 would be brilliant. I'm a bit worried about what you could do with the software as 50% of the brilliance of the original device was the OS and built-in apps (worried an updated model might have to run Android), but the form-factor was nigh-on perfect. I did almost an entire PGCE on a 5mx, so impressive was the keyboard. Colour screen with a few more pixels, modern ARM processor, decent chunk of memory, USB, WiFi, maybe a 4G modem, SD slot, fix the screen cable issues, yes update all of those, but
- keep the form-factor
- keep the stylus
- keep the thing running for a week on a pair of AAs
M.