Top three calculators ?

[megarat]

I do computations in R and Python for a living, so most of the time my calculation/computational tools are workstation- to cluster-sized, but for those times when calculators are preferred or more convenient:

1. HP 15c (both original, one of which I purchased new in 1988). I keep one at home and another at work, and they both get regular use.
2. HP 16c. I noodle around with 8-bit assembly programming (8085, 6502, and starting to play with the Z80), and the 16c is a great companion for this.
3. HP 48sx. I play around with this just for fun.

Something new might make the list, however, as I will soon be receiving an HP 71b.