Got ahold of a Casio fx-991ex and CG-50 to match my Classpad II. I'm really impressed with them but there is something about the fx-991ex... (see comments) : r/calculators
Casio FX991EX: ClassWiz FX-991EX Scientific Calculator – Icon Menu Display, Textbook Display, Slide-on Hard Case, Spreadsheet, Natural-VPAM – Solar, Battery Powered – 3" x 6.5" x 0.4" – 1 Each