Perfect Programming PDA/Palmtop/Calc

[rprosperi]

I suggest you also consider an HP-71B. It's the ultimate BASIC machine in many ways, but it has a limited display compared to some of the machines (1-line LCD 22-chars wide) you listed. It has about the most powerful variation of interpreted BASIC in any handheld. You can get one in good+ condition for under $200 on eBay, and there are MANY options for add-on program ROMs, peripherals, enhanced memory, etc., etc.

Since the platform options you have suggested are so diverse, maybe some more info. about the kinds of programs you want to write could help us give you more/better advice. For example, if you are mostly interested in math and calculating, the 71B is likely your best choice, but if you want to develop database/info programs, something like the 95LX with it's much larger screen would be better.