Best scientific (not programmable, not producing plots) calculator in your opinion.

[Gene]

Wow, can't believe I am about to type this...

IF you can live WITHOUT RPN, ugh, then IMO the HP 10BII+ is a fabulous calculator.

All the business functions you could want:
TVM,
Cash flow analysis,
Breakeven,
Depreciation,
Bonds,
Date calculations,
more of course.

A very good set of statistical functions:
Normal and inverse normal distribution,
Students t and inverse distribution,
Regression models including best fit,
Permutations, combinations, factorial and gamma,
basic statistics including sample and population measures

Good set of scientific functions:
Radians and degrees modes,
Trig and inverse,
Hyperbolic trig and inverse,
natural log and e^x,

and

Chain (boo) logic as well as real algebraic with precedence.

For under $20. It was also designed by Tim !