Well, after a Jornada 525 and now a Jornada 548, I thought I was sold on a color OS via Pocket PC.....
I'm a long time Sprint customer and always lusted after a PDA-Phone combo. Never being thrilled with the Palm OS and considering the expense I resisted.
Finally after the Kyocera 6035 was nearing the end of it's saleable lifespan and now coming down to around $125 or less, I bought one.
Fell in LOVE I did!
It lacks expandibility in the form of memory cards and lacks color, but for usefulness in everyday business and organisation I wonder how I ever survived without it!
There are TONS of PDAs available that will meet your stated needs for well under $100.