Top three calculators ?

[JSS]

1) was HP48G, now I am waiting for a 50G as a replacement

- ultimate scientific/engineering calculator (for it's time)
- probably one of the best keyboard layouts
- very good keyboard and built quality

2) HP35S

- excellent keyboard layout and physical appearance (this is why I use it and because very few new RPN calculators are available)
- reasonable keyboard and built quality (for it's time, far from original HP quality)
- limited two line display with some alphanumeric capabilities
- some minor bugs
- nice solver and equation writer
- very limited support for imaginary variables and vectors
- RPN programmability and lot of memory, but no I/O capabilities

3) Droid48 on Android

- too small keyboard for common Android phones
- does not fully emulate 48G