The Future of RPN Calculators
Noksagt writes "HP's recent release of the 33s won't be the last RPN calculator. Former HPers at Hydrix are hyping an impressive Linux-based PDA/calculator, named Qonos. They have a survey up regarding features, etc. More information can be found at comp.sys.hp48 or The Museum of HP Calculators.
A new open hardware project called OpenRPN has also begun. Their mission is to produce horizontal and vertical format scientific RPN calcs and later a graphing calc."
Has some negatives if it's to be called a PDA ,like a small screen.
That price is on the high side. Stick with Ti or buy a real PDA and get an emulator.